In this issue, Aspen Matthews returns to San Diego after escaping from the underwater realm known as the Black. Upon arrival, she discovers her roommate has moved out, and her father, Captain Matthews, is missing. Seeking assistance, Aspen turns to her friend Chance Calloway. Meanwhile, in the underwater city of Muria, Councilman Thalassar urges the Blue to respond to human aggression following the destruction of the city of Saba. Aspen and Chance decide to search for her father, setting the stage for further developments in the series.