They say when two people are destined to meet they are tied together by an invisible red thread.

On a journey that spans the formative years of their lives, two sisters navigate their loving but volatile father during their yearly summer visits to his home in Las Cruces, New Mexico.

Star returns to her home dimension of Mewni where she discovers that magic is disappearing throughout the kingdom. Star must dig deep and challenge archnemesis Ludo in an effort to save her family and kingdom.