Willie Cooper arrives on the doorstep of her ancestral home in Templeton, New York in the wake of a disastrous affair with her much older, married archaeology professor. That same day, the discovery of a prehistoric monster in the lake brings a media frenzy to the quiet, picture-perfect town her ancestors founded. Smarting from a broken heart, Willie then learns that the story her mother had always told her about her father has all been a lie. He wasn't the one-night stand Vi had led her to imagine, but someone else entirely.
As Willie puts her archaeological skills to work digging for the truth about her lineage, a chorus of voices from the town's past rise up around her to tell their sides of the story. Dark secrets come to light, past and present blur, old mysteries are finally put to rest, and the surprising truth about more than one monster is revealed.