Single mother Jane has dissociative identity disorder (DID) and nine other identities, or parts, that range in age from 6 to 28; navigating relationships gets complicated as each part has its own agenda.

Jane's mother attempts to reconnect, leaving Jane feeling deeply conflicted; while younger parts miss their mom, older parts are not ready to forgive her; in the end, Jane must decide what's best for everyone.

For Jane's 17-year-old part, being a teenager is hard enough without having to share her body with nine other identities; when Alexis' rebellious behavior threatens their progress, Jane fights to regain control of her system.

Jane enters a new phase of therapy, uncovering intense new memories from childhood; one of Jane's younger parts refuses to believe the truth about what happened.

A new, self-destructive part named Ashley emerges; Dr. Waters tries to crack Ashley's tough exterior.

Jane's shame and embarrassment over having younger parts is challenged when she travels to Boston to participate in an experiment, requiring help from her 10-year-old part, Beth.