When David chats-up a loopy local named Nina in the park, the sparks between the pair are quickly doused when David begins to feel guilty about distancing himself from long-time girlfriend, Lisa. Determined to make things right, David confesses his brief fling to Lisa, who dumps him, as does Nina. When a local dating agency sends Lisa's photo to David's slacker friend Matt, David sets out to win back his embittered ex by any means necessary.