Plot
"North Sea" Suwarrow Island. Rho, who died from his benefactor Corazon, overcomes lead disease with the ability of "Ope Ope no Mi" and meets Wolf of the inventor "Junk Shop" who believes in "Give & Take". Rho, who started helping Wolf instead of getting her bed and food, one day rescues a polar bear being bullied on the island's coast and makes him a minion. The polar bear was Bepo, who later became a navigator of the Heart Pirates. The boys killer whales and penguins who were bullying Bepo also began to love them, and the four pursued the mystery of the mysterious rumor of "swallows flying in the sea" related to Suwarrow Island. However, a vicious pirate stands in front of them .. Novelize the formation of the Heart Pirates!