The setting of the story takes place on a island in Bora Bora. The characters in the story are Mako, Afa the dog, Grandpa, Mom and tupa the shark.
Tupa the ghost of the lagoon as the villagers call him, haunts the lagoon and has killed people before such as Mako's father.
Mako practiced his spear throwing skills and was coming back from collecting fruit with Afa. Mako lost track of time and realized when they got back to the boat it was very dark.
Mako sees a fin circling the boat, Afa runs back and fourth and rocks the boat. Afa falls into the water, Mako makes the decision to save Afa and throw his spear with all his might right into Tupa's eye to pull Afa up on the boat.
Tupa charges for a attack, Mako throws his spear at a Tupa's other eye. Tupa floats on his back without moving, just to make sure that Tupa is dead Mako throws his spear with force at Tupa's shoulder. Mako ties Tupa up and drags him aside to shore.
Everyone is happy that Tupa is no longer a threat to the island, and Mako earns his reward of land and a new canoe.