In 2001, author and aspiring local politician Michael Peterson is charged with murder after the suspicious death of his wife Kathleen.

While working on his defense, Michael considers an opportunity to tell his story in a documentary; after learning shocking information about her stepfather, Caitlin wrestles with doubts.

As the DA's office attempts to solidify their case, shocking new details surface about Michael's past that threaten to derail the defense.

After an unexpected homecoming, a critical discovery rocks the Peterson household; Michael's fate hangs in the balance as the trial ends.

In the aftermath of the verdict in 2004, Michael and his family struggle with the court's decision; in France, Jean and his producer Denis butt heads over whose side of the story they are telling; Sophie strikes up an unlikely friendship.

In 2006, Sophie pursues a far-fetched new theory about the night of Kathleen's death; in 2017, Michael grapples with compromising his principles in exchange for his freedom.