Defending the house on Halloween, Charlie's in for a fright when Pierce invites the neighbourhood (and at least one monster) over for a costume party. They must trick the gatecrasher to reveal itself before it gets its treat.

Helsing tasks the gang with finding a magical Genie lamp, and he thinks they won't give it a polish? You wish. Now Charlie's famous, Pierce is a CEO and Que has legs. But here's the rub: some wishes are better left undone.

The gang find Helsing's monster phone-book and the temptation for prank calls is too much to resist. But when their furious victim 'Frank' is revealed to be the scariest monster in the world, they must prepare the house for his all-out assault.