When more than one gift card goes missing among a group of college roommates, one of them has suspicions as to what's really going on. Especially when she checks her accounts, and realizes that it's been used at Target and the liquor store. 

But when she finds her friend's lost wallet in the back of her car, complete with the stolen gift cards, she decides to leave it right where it is, even while a locksmith overcharges for new keys. 

There is no sweeterpetty revenge than for a $300 Visa gift card.