Ten-year-old Fiona is sent to live with her grandparents in a small fishing village in Donegal, Ireland. She soon learns the local legend that an ancestor of hers married a Selkie – a seal who can turn into a human. Years earlier, her baby brother was washed out to sea and never seen again, so when Fiona spies a naked little boy on the abandoned Isle of Roan Inish, she is compelled to investigate.

An eclectic group of characters set sail on Captain Lansen’s leaky cargo ship in an attempt to escape their various troubles. When a violent storm strikes, the ship is swept into the Sargasso Sea and the passengers find themselves trapped on an island populated by man-eating seaweed, giant crabs and Spanish conquistadors who believe it’s still the 16th century.

In a world tussling with climate change, an innovative start-up named All.g emerged with a mission to take action against it. One seaweed at a time, they pivot seaweed farming from traditional shores to uncharted territories of carbon credit markets. This documentary will dive deep into the seas of innovation, entrepreneurship, and sustainability, and will uncover the hidden potential of seaweed not only as a carbon warrior but as a catalyst for transforming livelihoods within seaweed farming communities.