Number 12 Grimmauld Place turns out to be a boring place for the mischievous Fred and George Weasley. When Molly Weasley finds herself at wits end she turns to Remus Lupin and Sirius Black for help. In order to teach the twins a lesson Sirius and Remus decide to give them a taste of their own medicine. The Weasley twins end up pitted against the Marauders in a prank war to end all prank wars.