Bree Donovan's life revolves around good luck charms and superstitions. She blames her obsessions on her Irish heritage. When her best friend sets her up on a blind date with Landon Murray, an efficiency consultant, Bree's beliefs are challenged. Landon is convinced he can prove to Bree in one weekend that luck doesn't exist. She's convinced she can prove that it's real. As the weekend progresses, she experiences unexpected consequences of their challenge. She's falling for him, but he thinks of her as nothing more than a problem to fix. Will Bree find happiness, or will her luck officially run out?