One dark night on the ocean as Big Mamma Hedgehog and her three children, Sebastian, Mercedes and Omen sail home, they encounter a storm that they cannot get through. As the storm assaults them from all sides, Omen is thrown overboard and dragged away by the waves. Desperate to save her child, Big Mamma tries to bring her raft about but loses control and, alongside her two remaining children, crashes into an unknown island. Knocked out, Big Mamma wakes up to find herself alone on an island that she has never seen before. Through asking locals, solving puzzles and traveling through many dangerous situations, Big Mamma must journey through the unknown to rescue her children and reunite her family.