Will, just being a 12 year-old boy, rides his bike through the woods passing by a laboratory. He sees something strange in front of him which causes him to panic and fall down a hill and crash. He abandons his bike and runs back home where he finds no one. He tries to call his parents but he only hears a whispering voice as someone tries to open the door. Will gets scared and runs to his shed in the backyard where he sees the same strange thing he saw when he crashed that vanishes him into thin air.
The next morning Will’s mom finds that he has mysteriously disappeared. The whole town goes looking for him and begins to uncover secrets of the government laboratory. They discover there are portals to another world, frightening monsters, and a strange little girl named eleven. Eleven manages to escape from the laboratory. She ends up finding Mike Wheeler who is one of Will’s best friends. Eleven then uses her supernatural abilities to help locate Will. When they find him will he still be alive? And will they be able to rescue him?
Sierra Burgess is a very smart student but isn’t very popular in school. Mean girl Veronica always attempts to make Sierra’s life miserable by being cruel and giving her mean comments. Jeremy is a handsome guy from another school that goes up to Veronica and asks for her number. Veronica has a boyfriend, so she gives him Sierra’s number instead in attempt to embarrass her. Jeremy texts Sierra thinking she’s Veronica. Sierra continues texting Jeremy even after she knows that he thinks he was texting Veronica. After flirting all nigh, Sierra starts having feelings for Jeremy.
Sierra ends up confronting Veronica who is upset because her boyfriend broke up with her because he thought she was dumb. She offers to tutor Veronica in exchange for her to talk to Jeremy and she agrees. As they begin to get closer and know each other better, Sierra finds out about her annoying family and understands why she is they way she is. This makes Sierra have more empathy for Veronica and makes her open up as well. Veronica continues to help her talk to Jeremy but the truth can’t be hidden forever. What will happen when Jeremy finds out that all along she was lying about her identity?
Clay Jensen comes home to a mysterious box with his name on it in the front of his house. He finds some cassettes inside the box who were recorded by a girl named Hanna Backer who he had a crush on. He never got to tell her how he felt because she tragically committed suicide. The tapes got passed down to Clay based on the instruction that Hannah gave in them. Hannah gave Tony, her closest friend, who listened to them and ran to her house right away. When Tony arrived he found out that she had already committed suicide and he was too late.
In the tapes Hannah talks about thirteen reasons why she committed suicide. Each tape has two sides where she talks about one person on each. As the Clay listens to the tapes he begins to feel very guilty and wants the people who hurt Hannah to pay for what they did, especially Brice who was the one who pushed her to the edge. Soon Clay will find out that he is in the tapes as well and he was one of the reasons. How will Clay react? What will Clay do with the tapes?