Los planes de Wren para acudir a una fiesta de halloween que celebra el chico que le gusta peligran cuando tiene que quedarse a cargo de su hermano pequeño, un bicho raro que pronto desaparece. Wren's Halloween plans go awry when she's made to babysit her brother, who disappears into a sea of trick-or-treaters. With her best friend and two nerds at her side, she needs to find her brother before her mom finds out he's missing.