Mako is a boy who lives in Bora Bora with his grandfather and mother.He spends most of his time in the lagoon with his companion Afa. Mako is great with his hands making a boat and a harpoon with spears on the end.
Makos grandfather tells mako a story about Tup the ghost of the lagoon. Tupa is a shark who kills fishermen who go out on the lagoon at night. He also tells Mako about the reward you get if you catch Tupa which makes mako want to catch him. Grandfathermentions one more thing. Tupa killed Makos father which gives Mako another reason to kill Tupa.
The next morning Mako wakes up late. His mom asks him to a few bunches of bananas. He agrees. On his way to the island he sees a coral reef that looks like a shark. He practices aiming for the eye holes a couple times. When he reaches the usland he grabs his bananas and realizes it's starting to get dark. As he's heading back to the island Afa starts barking like crazy. Mako soon realizes Tupa is near his canoe.
After Mako realizes Tupas presence Afa does too. Jumping from side to side Afa shakes the canoe. In a failed attempt to grab him the canoe starts to tip. Mako quickly throws his weight to the other side. Afa falls into the water. Mako is now faced with a complex decision save himself or Afa.
Mako starts to call Afa back to the canoe. Tupa charges at Afa . Mako pulls Afa back into the canoe. Now that Afa is safe it's time for action. Mako grabs his spear and Tupa charges at him. Aiming for an eye Mako throws his spear. All the practicing payed off! Mako didn't miss. Mako hits the other eye too. Tupa is now blind and weak. He is slightly on his side. Mako paddles forward. Tupa makes the slightest move of his tail. Mako takes no chances and stabs Tupas shoulder. Tupa is now dead. Mako ties his tail to his canoe and paddles to shore.
A feeling of relief and happiness washes over Bora Bora. Mako is relieved too. He got his revenge and his reward.