Just as the cave is about to collapse, Goku appears at the sea-bottom dock!! He has with him the mouse he owes his life to. Bulma launches the submarine, but it runs out of gas and stops. The sea-bottom canal is collapsing! Goku’s Kamehameha pushes the submarine to safety!! They return to Kame House with a pirate diamond. However, Blue has tenaciously survived, and follows them!! What’s more, Lunch takes the diamond and leaves after changing into her violent form.