Sabrina and Aiden are both the children of a god/goddess. Just separate ones. Aiden is the son of the Goddess of Light and God of Shadows, and Sabrina is the daughter of the Goddess of Water. Her father is unknown. William discovers that, and then tells Calypso. So Calypso and William work together to train Sabrina and Aiden to send them to Mt. Olympia so they can reunite with their real parents. They will encounter obstacles along the way, but that's all part of the plan.
12 parts