Dirtying fingernails in sewers are fast approaching worthlessness for Zachary, a 16-year old Underworld scavenger. When footage of an Overworld girl, Rosa, is discovered, his intrigue heightens at why she expresses sadness with a lavish lifestyle. In meeting Rosa, Zachary is scorned by her opinion of the deprived. She pities him and provides a means for them to communicate. With time, friendship and something he’s never felt grows; love for another human. Knowing Rosa calls him when it suits her isn’t enough; he wants to meet her, but how? Relationships in Underworld are few, let alone the impossibility with those above the ceiling. The underworld will suffer when Rosa's father approves plans to conquer Jupiter’s moon, Europa. In space, love has boundaries.