If your mother went missing, would you tell the police? Even if your father was the prime suspect? And just such a dilemma faces the four adult Delayne siblings. Everyone in town knows them, and their parents, Stan and Joy, are the envy of their friends that even after fifty years of marriage there is still a spark between them. But is it really so? Now that they've sold the famous tennis academy they've spent years building together, it's as if suddenly - apart from the hope of grandchildren, of course - there's nothing left to connect the two. And then one night a stranger rings their doorbell, introducing herself as Savannah, who needs help because her boyfriend has attacked her. The Delaneys don't hesitate and take care of the injured girls. Not long after that, however, Joy disappears and the ground seems to collapse after Savannah. Two of Delayn's children think the father had nothing to do with it at all - and the other two think the exact opposite! And the more questions the Delaney siblings ask themselves, the more subtle cracks appear in the picture of their parents' perfect marriage...