Arrowood is the most ornate and grand of the historical houses that line the Mississippi River in southern Iowa. But the house has a mystery it has never revealed: It’s where Arden Arrowood’s younger twin sisters vanished on her watch twenty years ago—never to be seen again. After the twins’ disappearance, Arden’s parents divorced and the Arrowoods left the big house that had been in their family for generations. And Arden’s own life has fallen apart: She can’t finish her master’s thesis, and a misguided love affair has ended badly. She has held on to the hope that her sisters are still alive, and it seems she can’t move forward until she finds them. When her father dies and she inherits Arrowood, Arden returns to her childhood home determined to discover what really happened to her sisters that traumatic summer. Arden’s return to the town of Keokuk—and the now infamous house that bears her name—is greeted with curiosity. But she is welcomed back by her old neighbor and first love,...