The plot begins with Leo and Van seemingly preparing for a camping trip, until they are interrupted by Kiri, a member of the BB treasure hunters, who claims the brothers have the map that she needs to locate the treasure of the twin islands. After ransacking the brothers' house for the map, they kidnap them. From there, One of the two brothers are separated, one being thrown into the sea, and the other being held captive.
In this RPG, your main aim is to survive against the odds of nature and find your way back to civilization. Using the much loved top down adventure viewpoint, the first game in the series found our main protagonist washed up on a desert island. By combining items, bravely eating foraged goods and scouring the land, escape is made possible.