In the year 2122, a young boy named Ikki doesn't have a Medabot and everybody else does, so he's been saving his money for years going back to the same store, looking at the Medabots. One day the owner of the store tries to sell him an old Medabot, then one day a kid from the screws has his Medabot stolen and his leader goes to see the punks who stole his friend's Medabot and they start picking on Ikki's friend, so Ikki runs and finds a medal in the river and he buys the Medabot and saves his friend. his name is Metabee.

The 'Old Man' helps Ikki and Metabee fight on water to to beat the bad bully-meanies.