In The Reeds, a weekend boating trip through the Norfolk Broads becomes a terrifying, deadly ordeal for six 20-something year old friends.

Aboard the Corsair Star, a small cruiser rented from Mr. Croker, the local marina operator, the boating party loses its bearings and cuts through the vast reedy tidewater in search of the main channel. After the first casualty by a freak accident, the boat runs aground.