Good-natured astronomer Sam is devastated when Linda, the love of his life, leaves him for suave Frenchman Anton. He does what every other normal dumpee would do: go to New York and set up home in the abandoned building opposite his ex-girlfriend's apartment, intent on winning her back and waiting until she decides to leave her current lover. What Sam does not count on is being joined several weeks later by ultra-hip tomboy Maggie, a photographer and motorcyclist who is determined to get revenge on Anton--her ex-fiancé. Hostile at first, the two eventually join forces in an attempt to separate the couple and ruin Anton's life. They also start to fall for each other.