On planet Promise, which means the promised land, Brown works on the mineral exploitation.
However, Promise is the sole resources for the planet Emeralda and under a strict control.
Brown is sent here because of the crime he has committed.
In this restricted society, the only entertainment for the workers is the "nurse contact."
On the pretext of body check-up, the nurses are actually comfort women.
Erika comes to Promise as a nurse, and now Brown's animal desire is driven to her.