In an effort to understand why that happens to her, Samantha undertakes new actions each day, some of which are out of character and surprise her family and friends.

The story begins on a seemingly normal day for the popular 17-year-old Samantha "Sam" Kingston.

Sam's friends react to the accusation by pouring alcoholic beverages on Juliet, calling her names, and shoving her.

Sam tells her sister it's Saturday, but then is confused to find that it is still February 12 on her clock - and that the day has magically restarted.

Upon showing up at the party and realizing Sam and her best friends were not there, Juliet returned home and died by a self-inflicted gunshot wound.

Lindsay, who has led the bullying efforts toward Juliet for years, shuts them down by being indifferent towards what happened.

She dresses in a skimpy outfit with the word "slut" written on it, gets into a fight with her parents before school, and insults all of her friends, which effectively ends their friendship and enrages Lindsay to the point that she forces Sam out of the car and leaves her to walk to school.

In calculus class, Sam brazenly flirts with her perverted math teacher, Mr. Daimler.

In a gesture of solidarity, they end up trading footwear, Sam's extremely high heels, and Anna's comfortable combat boots, for the remainder of the day.

When Juliet enters the party that night, Sam is desperate for a distraction and so leads a drunk Rob over to an empty bedroom with the intention of having sex.

Sam quickly puts her clothes back on, stumbles into a barred-off section of Kent's house, and sobs.

Sam wakes up in her own room on the fifth morning of February 12 and makes a list of all the things in her life she wants but will probably be unable to do.

She meets her mother and realizes that her father is indeed an alcoholic and that the family struggles with some deep issues.

Ally and Lindsay are unhurt, but Elody, who is sitting in the front passenger seat, where Sam would have otherwise occupied, is killed.

As it is still "Cupid's Day," Sam sends dozens of flowers to Juliet from "her secret admirer," who interprets it as a taunt, rather than a compliment.

Sam then enacts revenge on certain people in vindictive ways, such as embarrassing Rob at Kent's party and revealing to Alex's girlfriend that he's cheating on her, which enrages both of them.

Sam breaks up with Rob, who gets extremely angry because he had always shrugged her off as not being cool enough for him although there was never an actual attraction on either side.

Sam gets picked up by Kent, and they make out in the car when they get to his house, but she accidentally lets slip that she "doesn't have much time."

In October, Halston Sage was cast, along with actor Logan Miller and YouTube star Kian Lawley.

Later that same month, Scream Queens star Diego Boneta and actress Elena Kampouris were also announced as part of the cast.

[9] The School Library Journal wrote that although the book was "somewhat predictable, the plot drives forward and teens will want to see where Sam's choices lead".