
Juliet commits suicide by running in front of Lindsay's car, horrifying Sam, and making her realize that it was Juliet who was hit by the car on the original day. When the two were on a camping trip and Lindsay wet her sleeping bag, she blamed Juliet and had been bullying her ever since. Sam tries to apologize and learns from Juliet that Lindsay's misery from her parents' fighting and divorce caused her to develop Nocturnal enuresis. She hears the fight between Lindsay and Juliet from the hall and chases after her through the woods. In another loop, Sam and Kent share a kiss at the party, with Kent recalling how she had heroically defended him from a bully after his father died and that he had resolved to one day be her hero. After an unsatisfying first sexual experience with Rob, Sam is comforted by Kent and remembers their earlier friendship. During these loops, she attempts to make amends with Anna Cartullo, a student she had bullied and becomes closer to Kent. Realizing that nothing she does matters, she starts doing whatever she wants, first airing her grievances with everyone she knows, then trying to spend more quality time with the ones she loves. Even though Sam manages to avoid the crash, she continues to live through the same day over and over again. They avoid the crash, but find out later in the night that Juliet committed suicide, with Sam also discovering that Lindsay and Juliet were once best friends. Realizing she's in a time loop, she convinces the group to have a sleepover at Ally's instead of going to the party. Thinking the previous day was just a nightmare, Sam continues on with her day but finds that the same events occur, and they again crash after leaving the party.

Sam wakes in her room on Cupid's Day again. As Sam and her friends are driving back from the party, the car hits something and crashes, apparently killing them. Lindsay confronts her and the two fight, resulting in many of the guests dousing her with beer. During lunch the girls make fun of Juliet Sykes, an outsider girl who they view as a "psycho". Kent invites her to a party at his house, but she's unenthusiastic. During a class lecture on Sisyphus, students distribute roses, with Sam getting one from Rob and another from a boy named Kent McFuller, a former grade school friend who is in love with her. She is picked up by her friends, queen bee Lindsay Edgecombe, Ally Harris and Elody, who are excited about Sam's plans to lose her virginity to her boyfriend Rob Cokran that night.

Trapped reliving the same day over and over she begins to question just how perfect her life really was. After one fateful night, Sam wakes up with no future at all. What if you had only one day to change absolutely everything? Samantha Kingston has it all: the perfect friends, the perfect guy, and a seemingly perfect future. Stuck reliving her last day over and over, Sam untangles the mystery around her death and discovers everything she's losing.

February 12 is just another day in Sam's charmed life, until it turns out to be her last.
