Thievery and treachery are second nature for the world's largest land crab. This documentary explores the untold story of Christmas Island's iconic robber crabs. Armed with claws that deliver more force than a lion's bite, they can grow a metre across and are relentless in their search for food. However, the brash crustaceans have surprisingly complex private lives and often find themselves in precarious situations, whether escaping from frenzied ants or risking their life to deposit fertilised eggs into a raging ocean. To tell the story of the robber crab's life cycle, directors Moritz Katz and Braydon Moloney spent a year in the field, following their subjects in minute detail. The tragedies, trials and triumphs paint a fresh, humorous portrait of Christmas Island and its nefarious denizens.