The five fish prince brothers were left without parents when their mother and father disappeared on an adventure to the ocean. The youngest brother, Kristoff, felt responsible and left on his own quest to find them, abandoning his kingdom. After three years away, Kristoff returned a failure and refused to rejoin his brothers. They pleaded with him, saying it was not his fault their parents were gone and that they needed him to come home. Reassured, Kristoff reunited with his brothers and kingdom.