I will really watch this whether I am alone or with friends. :)
These infos are obtained from wikipedia.org.
Suburban mother Diana Goodman waits up late for her curfew-challenged son and comforts her anxious and overachieving daughter, Natalie. Dan, her husband, then rises to help prepare her family for "Just Another Day." But when her lunch-making takes a turn for the bizarre with sandwiches covering the table, chairs, and floor, the rest realize something is not right. As Dan helps the disoriented Diana, Natalie hurries off to school and the refuge of the piano practice room ("Everything Else"), where she's interrupted by Henry, a classmate who likes to listen to her play — and clearly likes her.
Over the ensuing weeks, Diana makes a series of visits to her doctor, while Dan waits in the car outside, questioning how to cope with his own depression ("Who's Crazy?/My Psychopharmacologist and I"). Diana has suffered from bipolar disorder coupled with hallucinations for sixteen years; Doctor Fine continually adjusts her medications until she says that she doesn't feel anything, at which point he declares her stable. Natalie and Henry grow closer until one day he professes his love for her ("Perfect For You") and they kiss for the first time. Diana witnesses this and realizes that her best years may be behind her, but she misses feeling her high highs and her low lows ("I Miss the Mountains"). With her son's encouragement, she flushes away her medication.
A few weeks later, Dan looks forward to dinner with his family ("It's Gonna Be Good"), but when Diana emerges with a cake singing "Happy Birthday" to her son, Dan and Natalie are devastated. Dan holds Diana and explains that "He's Not Here". Their son died sixteen years ago from an intestinal obstruction before Natalie was born. Natalie storms off. Dan mentions a return to the doctor, but Diana refuses, saying that he can't possibly hurt the way she does ("You Don't Know"). Dan tries to coax her into trusting him, and their dead son joins them onstage, convincing his mother to trust him rather than his father ("I Am The One"). In her room, Natalie vents her anger to Henry, then refuses Diana's apology as her brother watches and taunts her ("Superboy and the Invisible Girl").
A few days later, Diana starts work with Doctor Madden. As her son rises to assert his presence ("I'm Alive"), Dan and Natalie doubt the sessions are helping, but Doctor Madden proposes hypnosis to help Diana discover the roots of her trauma ("Make Up Your Mind/Catch Me I'm Falling"). Finally, Diana agrees it's time to let her son go. Diana goes home to clean out her son's things, pausing to listen to a music box ("I Dreamed a Dance"). Her son appears and dances with her, then invites her to come away with him ("There's a World"), and she does.
At the hospital, where Diana lies sedated and restrained, with self-inflicted gashes to her wrists, Doctor Madden explains to Dan that ECT is the standard course of treatment for drug-resistant patients who are imminently suicidal. Dan goes home to clean up after Diana and decide what to do ("I've Been"). The next day, Diana lashes out at Doctor Madden, refusing the treatment ("Didn't I See This Movie?"), but Dan arrives and convinces her it may be their last hope ("A Light In The Dark").
Diana receives a series of ECT treatments over two weeks. Meanwhile Natalie explores clubs and drugs ("Wish I Were Here"). Diana returns home from the hospital, but she has lost nineteen years of memory ("Song of Forgetting"). At school, Henry confronts Natalie about her avoiding him, and invites her to the spring formal dance ("Hey #1").
Dan and Diana visit Doctor Madden, who assures them that some memory loss is normal ("Seconds and Years") and encourages Dan to use photos, mementoes, and the like to help Diana recover. Dan gathers the family to do so ("Better Than Before"), with minor success, but when Natalie pulls the music box from a pile of keepsakes, he whisks it away, leaving Diana puzzled. Her son appears, unseen ("Aftershocks"), while Diana tells Dan there's something she's desperate to remember that's just beyond her reach. When Henry arrives looking for Natalie, Diana is given great pause, studying his face and asking his age. He reminds her of someone. Unnerved, Henry hurries up to Natalie's bedroom, to convince her to join him at the dance the next night ("Hey #2").
Diana returns to Doctor Madden ("You Don't Know [Reprise]") who suggests she further explore her history and talk more with her husband. Diana goes home and searches through the boxes of keepsakes, finding the music box, Dan tries to stop her, but the memories of her baby son rush back ("How Could I Ever Forget?"). When Diana confesses remembering her son as a teenager, and demands to know his name, Dan refuses and instead insists they need to return for more treatment ("It's Gonna Be Good [Reprise]"). Henry arrives to pick up Natalie, who has dressed for the dance, just in time for both of them to witness an agitated Dan grab the music box from Diana's hands and smash it to pieces on the floor.
Diana confronts Dan, wondering why he perseveres after how much trouble she's given, while upstairs, Natalie asks Henry much the same question ("Why Stay?"). Dan answers, echoed by Henry, both vowing to stay steadfast ("A Promise"), but just as both couples embrace, their son reappears ("I'm Alive [Reprise]"), sending Diana running to Doctor Madden, asking Natalie to drive her, leaving Dan and Henry behind.
Diana asks Madden what can be done if the medicine has missed the true problem. With her questioning comes the realization that it's not her brain that's hurting: it's her soul ("The Break"). Madden assures her relapse is common, and suggests more ECT ("Make Up Your Mind/Catch Me I'm Falling [Reprise]"). Diana refuses, and though Doctor Madden urges her to continue treatment for her chronic, deadly disease, she thanks him and goes. Natalie, waiting outside, is distressed to learn her mother has left treatment, and Diana explains herself ("Maybe [Next to Normal]"), opening up to her daughter for the first time. She urges Natalie on to the school dance, where Henry awaits to comfort and embrace her ("Hey #3/Perfect for You [Reprise]").
Diana tells Dan that she is leaving him, explaining that he can't always be there to catch her; she needs to take a risk and deal with things on her own for once ("So Anyway"). She goes, leaving their son with him. As Dan wonders how she could have left him after he stood by her for so long, their son approaches, telling Dan he's not going anywhere ("I Am The One [Reprise]"). Dan grows more distraught until at last he faces the boy and calls him by his name for the first time: Gabriel.
Natalie comes home to find her father sitting alone in the dark, in tears. She comforts him and turns the lights on in the room, before assuring him that the two of them will figure things out ("Light"). Henry arrives to study, and Natalie tells him Diana has gone to stay with her own parents. Diana is alone and still hurting, but hopeful. Dan visits Doctor Madden hoping to talk about Diana, but stays to talk about his own struggle. Once again Gabriel watches over them all, as life goes on.
 Musical numbersNote: The song titles are not listed in the program
"Prelude" – Orchestra
"Just Another Day" – Diana, Natalie, Gabe, Dan
"Everything Else" – Natalie
"Who's Crazy" / "My Psychopharmacologist and I" – Dan, Doctor Fine, Diana, ensemble
"Perfect for You" – Henry, Natalie
"I Miss the Mountains" – Diana
"It's Gonna Be Good" – Dan, Natalie, Gabe, Henry, Ensemble
"He's Not Here" – Dan
"You Don't Know" – Diana
"I Am the One" – Dan, Gabe, Diana
"Superboy and the Invisible Girl" – Natalie, Diana, Gabe
"I'm Alive" – Gabe
"Make Up Your Mind" / "Catch Me I'm Falling" – Doctor Madden, Diana, Dan, Natalie, Gabe
"I Dreamed a Dance" – Diana, Gabe
"There's a World" – Gabe
"I've Been" – Dan
"Didn't I See This Movie?" – Diana
"A Light in the Dark" – Dan, Diana
"Wish I Were Here" – Diana, Natalie
"Song of Forgetting" – Dan, Diana, Natalie
"Hey #1" – Henry, Natalie
"Seconds and Years" – Doctor Madden, Dan, Diana
"Better Than Before" – Doctor Madden, Dan, Natalie, Diana
"Aftershocks" – Gabe
"Hey #2" – Henry, Natalie
"You Don't Know" (Reprise) – Diana, Doctor Madden
"How Could I Ever Forget?" – Diana, Dan
"It's Gonna Be Good" (Reprise) – Dan, Diana
"Why Stay?" / "A Promise" – Diana, Natalie, Dan, Henry
"I'm Alive" (Reprise) – Gabe
"The Break" – Diana
"Make Up Your Mind" / "Catch Me I'm Falling" (Reprise) – Doctor Madden, Diana, Gabe
"Maybe (Next to Normal)" – Diana, Natalie
"Hey #3" / "Perfect for You" (Reprise) – Henry, Natalie
"So Anyway" – Diana
"I Am the One" (Reprise) – Dan, Gabe
"Light" – Diana, Dan, Natalie, Gabe, Henry, Doctor Madden
Gabriel "Gabe" Goodman
Dr. Fine/Dr. Madden
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