Adapted from Jay Asher's young adult novel, Netflix's 13 Reasons Why revolves around Hannah Baker, a teenage girl who commits suicide. Hannah leaves behind a set of tapes addressed to individuals at her school. She instructs the listeners to pass on the tapes in a chain letter style and warns that a separate set will be released to the public if someone breaks the chain.
The series bypasses the novel in its second season as Hannah's case goes to trial. We hear from the tape subjects themselves as they testify in court. The second season ends with a cliffhanger that strongly suggests that there will be a third season. But Katherine Langford, who portrays Hannah, has announced that she will not appear in a third season of 13 Reasons Why.