Master Roshi tells Goku and Krillin to take a break from training for now, but Krillin still decides to go live with him. Goku sets off on his search for the four-star Dragon Ball. Meanwhile, Nam has arrived at his village with the water, but it is s... (more)till not enough. The river has run dry, so Nam heads upstream to find the source of the disturbance. He is attacked by a dinosaur, but luckily Goku is swimming in a nearby lake and comes to rescue him. He and Nam continue upstream and find that a dam has been built. The monsters that live there refuse to tear it down. Their leader, Giran, recognizes Goku from the tournament. He says that he would tear it down, but it's too strong for them to break. Goku fires a Kamehameha wave at it, which is enough to destroy the dam. With the river replenished, everything seems okay, but a sandstorm suddenly kicks up and dries up the river again. Goku notices the lake he was swimming in before. This is the Roaming Lake, and it came to help the village.