A young girl named Haley Thrums, who is the daughter of Grace Thrums, the owner of Zonko's at the time, has a few abilities. She seems to be immune to any prank, can hover without a broom, can go invisible without a cloak, and can walk through solid objects, although she cannot control some of these powers. Something she isn't immune to is the charm of Sirius Black. She started out as friends with James and Remus, but Sirius started being mean to her, and James turned on her as well, leading her to leave them. She still couldn't stop her feelings towards Sirius, no matter how rude he was. Eventually, the Marauders try to prank her, but nothing happens. So of course they try again. And again and again. Eventually they come to the conclusion product pranks don't work, so they decide to pull a prank she can't avoid. They have Sirius pretend to actually like her. While the two are 'together', Sirius learns that Haley is perfect for him. The only problem is, he has a reputation to keep with the boys. Will he choose Haley, or break her heart and stay the player with the boys?