Only we know

In 1982, on a once-in-a-lifetime holiday beneath the stifling heat of the midday sun, three children start a game that ends in tragedy. Now, thirty years later, Nick, Luke and Katie are estranged, yet still bound together by the dark truth of what happened at the river that day. Except some secrets won't stay buried. And when Luke suddenly vanishes and the threatening messages begin, it seems that the strings of the past are tightening around them all. Because someone else knows what they did and is intent on seeking justice, at any cost....