The Magdalen Islands sit in the middle of the Gulf of St. Lawrence, a patch of water so treacherous that locals count over a thousand wrecks along its shores. Leonard Clark, an amateur archaeologist whose own family has tracked the wrecks for three generations, walks the beaches and archives that hold the evidence, much of it tied to islanders who are themselves descended from shipwrecked sailors. He works alongside Mario Cyr, an underwater cameraman known internationally for his Arctic and marine footage, diving to film wreck sites and pulling up physical clues to where these ships came from and how they went down. The film moves between present-day interviews on the islands, underwater camera work at wreck sites, and historical detail about the storms and currents that made this stretch of water so lethal to sailing ships. Rather than one shipwreck story, it builds a portrait of a community whose identity is bound up in the wrecks scattered around it, and in the slow work of tracing names and origins back to the sea.