Seven years ago, two boys went missing at sea - and only one was brought to shore. The Sandbank, a remote stretch of coast dotted with beach huts, was scarred forever. Sarah's son survived, but on the anniversary of the accident, he disappears without trace. As new secrets begin to surface, The Sandbank hums with tension and unanswered questions. Sarah's search grows more desperate, and she starts to mistrust everyone she knows - and she's right to.