Gwen keeps a list of enemies. Not that she'd ever hurt any of them - she just likes knowing if karma catches up.
So when her childhood bully drowns in sewage, Gwen's quietly satisfied. But then another foe dies. And another. Soon, everyone who's ever crossed Gwen - from sworn enemies to obnoxious strangers - is meeting a bizarre end.
The police think Gwen's involved, but she's terrified. Someone's turning her private grudges into a murder spree, and if Gwen doesn't stop them, her newly rebellious daughter could be next . . .