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Clay Jensen recieves a mysterious package.
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Clay Jensen finds 13 tapes in the package.
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In curiousity Clay begins to play the tapes and finds out the the tapes lead the the reason why one of his classmates, Hannah Baker, committed suiside.
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Justin is introduced in the tapes as Hannah's first kiss. Justin begins to spread false rumors about Hannah and she begins to get targeted by other students.
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Alex makes a list about people in his class where he makes two sides, one side is the hot side the other side is not not side. Hannah gets placed on the hot list and Jessica (one of Hannahs old friends) gets placed on the not list which causes a conflict between the two.
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Marcus asks Hannah out, after Hannah agrees, he tries to rape her. This is the point where Hannah becomes depressed and considers taking her own life.
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Jenny is a popular cheerleader at Hannah's school, one day she offers Hannah a ride to a party. On the way there Jenny crashes into a stop sign, when Hannah tries to call police, Jenny kicks her out of the car. Later on a student from their high school dies because of the missing stop sign. This incident makes Hannah feel guilty.
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Zach starts to act like he is one of Hannahs friends after the Marcus incident. What Hannah doesn't know is the he is only acting.
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Tyler secertly takes pictures of HAnnah in her house.
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Ryan publishes Hannahs poem in his colume called Lost and Found. After that poem is exposed to students, they figure out that it is written by Hannah and begin to mock. At this point in the story Hannah begins to feel as if even her thoughts aren't her own anymore.
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Courtney uses Hannah to keep her image high in front of her classmates.
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Jessica slaps Hannah because of the list that Alex made.
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Hannah goes to Courtney's party where she is sexually abused by Bryce. Courtney, who knows everything, denies the whole event which causes Hannah to fall into depresion.
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Clay is introduced into Hannah's tapes. Hannah describes clay as the nicest person she has ever met.Clay and Hannah are at a party and they begin to talk. Soon afterwards they begin to kiss, Hannah begins to think that Clay is just like Justin and tells him to leave.
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Hannah goes to Mr. Porters office to express her thoughts. She tells Mr. Porter that she wants to commit suiside. Mr. Porter tells her to move on and doesn't try to help her. She soon commits suiside.
