Working on the Godding Museum's annual local artist show is the perfect way for English teacher Sarah Deane to earn a few dollars, relax in the sun and sea air of coastal Maine, and spend the summer with her boyfriend, Dr. Alex McKenzie.

But when Sarah and Alex discover the body of Nate Harwood, a cranky local artist, caught in an offshore fish trap, they know they'll have no vacation from amateur detecting until they catch his killer.

Could his death be related to the "accidental" drowning of two elderly tourists shortly after they had brought a painting from Prior's Gallery? Is one of the contestants in the museum show willing to go to any lengths to win? Or does someone have strong feelings against seascapes?

Sarah and Alex canvass Weymouth Island trying to draw a clearer picture of the killer lurking among them - before they find the next victim.