As the school mourns the death of Hannah Baker, her friend Clay receives a box of tapes with messages she recorded before she committed suicide.

Hannah makes friends with Jessica and Alex, two other new students. Justin doesn't show up at school, and Hannah's mother finds something troubling.

Jealousy and gossip take a toll on Hannah's relationships. As Alex struggles with feelings regret, the guys pressure Clay into getting drunk.

Hannah seeks help from Mr. Porter, the school counselor. Clay plays the new tape for Tony and weighs what to do next.

Five months after Hannah's death, the case against Liberty goes to trial, with Tyler as the first witness. Clay finds a troubling photo in his locker.

Alex blows up at Bryce. Someone blackmails Marcus. Clay testifies about a night he and Hannah spent together. Jessica experiences a flashback.

Threats against Clay and the others escalate. Tyler faces disciplinary action. Justin testifies about Bryce, putting his own future at risk.

One month later, Hannah's loved ones celebrate her life and find comfort in each other. Meanwhile, a brutal assault pushes one student over the edge.

The cops question Clay about Bryce's disappearance. Clay remembers the aftermath of Spring Fling, when he raced to cover Tyler's tracks and met Ani.

Clay is released on bail, Ani puts a plan to exonerate him into action, and the truth about Bryce's murder finally comes to light.

The police question Tyler about the guns, leaving the friends rattled. Winston transfers to Liberty High after getting expelled from Hillcrest.

When the dean begins a new investigation and threatens to cancel prom, the friends decide to confide in their parents ... but not about everything.

Strengthened by the struggles they've endured, the friends say goodbye to high school and look toward the future.