In the wake of a wildly disastrous affair with her married archaeology professor, Willie Upton arrives on the doorstep of her ancestral home in storybook Templeton, New York, looking to hide in the one place to which she swore she'd never come back. As soon as she arrives, though, a prehistoric monster surfaces in Lake Glimmerglass, changing the very fabric of the town. What's more, Willie's hippie-turned-born-again-Baptist mother, Vi, tells her a secret she's been hiding for nearly thirty years: that Willie's father wasn't the random man from a free-love commune that Vi had led her to imagine, but someone else entirely. Someone from this very town. As Willie puts her archaeological skills to work digging for the truth about her lineage, she discovers that the secrets of her family run deep when past and present blur, dark mysteries come to light, and the shocking truth about more than one monster is revealed.