My names Mabel Pines, I live with my great uncle Stan and my twin brother Dipper. lately at night I've been hearing howls and foot prints outside and its been driving me crazy. so one night I decided to check it out but the disaster struck.....

Dipper has been sneaking off without mabel or pacifica ( they are friends now ) so they decide to follow him what will happen when they discover where he has been going and who he is