Five years ago, Molly Gabriel lost her 20-year-old son, Joey, to a terrible sailing accident. His empty boat was found washed ashore on the rocks - but his body was never found. Now, Molly has returned to the sands of Cornwall haunted by his disappearance, unable to accept he is gone. Joey was an experienced sailor and died on a calm sea - things just don't add up and Molly cannot let it go. Desperate for answers she turns to Joey's best friend, Ben, to go back to what really happened that day.