Rosalind Breen, a beloved member of the community, has died, taking a shocking secret with her to the grave and leaving her son Daniel to run their farm and care for his brother, Caleb. Meanwhile, Minsmere Reserve is suffering a spate of vandalism and, when one of the bird hides is burnt to the ground, Frank, Laurel and their team are enlisted to help find the culprits. But they've barely begun when the body of a local teenager washes up on the coastline and they are faced with a murder enquiry. What's worse, there seems to be only one suspect - Caleb Breen. When a long-lost relative turns up, offering a large sum of money to help prove Caleb's innocence, Daniel is forced to put his brother's fate in the hands of someone he doesn't trust, with devastating consequences. Can the Anglian Detective Agency catch the killer and crack this complex case before another life is taken?