In a turn of events, Miles meets Ekko, a siren whose existence he thought was purely folklore. Discovering Ekko injured in the Brooklyn harbors, Miles extends a hand to help. With the help of Uncle Aaron, they allow Ekko into their home while making sure to look into the mysteries of his origins. As emotions grow more complex and Ekko gradually becomes detached from his previous sea life, both teens learn to understand each other and navigate the complexities of an unconventional love.