Star continues to unravel the mystery of her family, determined to get to the truth at all costs!

When her “sleep-portaling” threatens the balance of the universe, Star must put an end to it before it’s too late. During a Monster/Mewman celebration, the guests begin to disappear! And when someone from her past returns and threatens the kingdom, Star must summon the courage to face them once and for all. Star will do whatever it takes to protect Marco, her family and the citizens of Mewni, even if it means changing the world she knows forever!