It's Halloween and Kaz and Oliver plan to prank Bree and Chase. But when Oliver asks Skylar out, they agree on that night, so Kaz loses his prank partner (who was the better pranker of the two). When Kaz tries to prank Chase, he sees that Chase is trying to crack shape-shifting to help them know more about Roman and Ryker's powers. Seeing this as a fantastic prank, Kaz drinks the stuff and pranks Oliver and Skylar in the middle of their date, but gets more than he bargained for. Meanwhile, Perry asks Bree for her help while an odd but dangerous streak of bad luck on Halloween from the past may strike her again this Halloween night.