Tensions between the alien species the Cocken and the humans have been tense for centuries. Cocken high commander Zexen is determined to end that tension and return his people home. His greatest scientists have constructed a great ship that can travel the stars, but it can only be powered by the commander's DNA. There is only one food nutritionally dense enough to sustain the commander as he powers the ship; cream from a human woman .
Determined to see the invading aliens removed form Earth, the human woman Petal volunteers to be Zexen's food source . There is only one problem, she is not and has never been pregnant . To induce her production of cream , the Zexen apply a new drug directly to her chest , causing her bosom to expand and begin producing enough for Zexen to consume .