Serena is a lost whale searching for her pack and her ocean. Ugo is a boy with great curiosity, eager to discover new things. When Ugo needs to solve a problem in his everyday life, Serena appears to help. She appears under the bed, inside a closet or in the bathtub. She can swim, fly, shrink and expand.
In each episode the take on a new journey to a fantastic new place where they meet and help new friends, live great adventures, and at the same time search for Serena´s pack.