Just as Princesses Merida, Rapunzel, Anna, and Queen Elsa settle down from their adventures, fate drives them together - and apart - to fight a war against a returning evil that threatens their kingdoms, their loved ones, and their own lives.

Rapunzel is married to Eugene now, but an old vendetta, a girl who bears a striking resemblance to Gothel, and a mysterious prophecy are in the works to unsettle her life and threaten the ones she loves.