On the surface of things, Sharon Lewis is a lot like any other happily married mother of three: she is the beating heart of a house full of kids, cooking and chaos, the one who always knows the after-school practice schedule, where her husband put the car keys and who needs a little extra TLC. Her kids and husband think she's a little spooky, actually, the way she can anticipate the tensions of any situation—and maybe they love her all the more for the extra care she gives them.
 
Life is definitely good until the morning Heather Edwards, a pregnant teenaged friend of the family, kills herself. The reverberations of that act, and the ugly secrets that sparked it, prove deeply unsettling to the whole family, and stir up Sharon's own troubling secret: she has DID, or dissociative identity disorder. And the multiples inside the woman the world knows as Sharon seem to know what happened to Heather, and what may be happening to Heather's surviving sister.
Will Sharon's need to protect the innocent cause her to finally come clean about her true nature with her family and friends, and not just in the anonymous chat rooms on the web where she's connected to others like herself? Will a woman with DID be able to persuade her quiet and respectable community that evil things can happen even in the nicest homes?