Chester and Luz have reached a turning point in their relationship; Amy must take matters into her own hands as she's tormented by a powerful nemesis; Chester meets a boy who gives him answers.

The Terminal Islanders return home to find that things have changed since they left; the Nakayamas, still tense from the pain they've inflicted on one another, must come together to battle the spirit that threatens their future.

Henry and Asako look to the past to provide answers to their current turmoil; Chester and Luz grapple with their identities in hopes of saving those who are dearest to them; Amy and Yamato-san struggle to once again assimilate into American life.