A former FBI agent must save her husband from a killer in the Idaho mountains in this thriller by the New York Times bestselling author.

As an FBI Special Agent, Lucy Guardino faced horrors of all kinds. But now she must face turning forty. Her birthday features black balloons, gag gifts, and a visit to her surgeon who isn't happy with the way her leg has healed. Then she finds a missed message from an old friend, a sheriff in a remote region of Idaho's Bitterroot mountains, who needs her help.

Lucy calls back only to learn he's missing, presumed dead. Was it an accident? Suicide? Murder? The grieving widow and stunned community have no answers. Now Lucy and her husband Nick are heading into the wilderness to solve the mystery. But when Nick ends up in a killer's crosshairs, will Lucy still have what it takes to save the day?