Nineteen-year-old Jesse's summer just hit a speed bump: the FAP-19 virus. Toughing out a sudden onset of womanhood will be no easy task. To make matters worse, his closeness to a client of his lawn-mowing serviceSarah, a pregnant womanhas given him a certain, milky side effect. Before long, Jesse is seeking out her firsthand experience for how to deal with his leaky situation, and making repeated use of her pumps. And when Sarah offers to buy what his body is making, Jesse comes to realize that she's the first client of a new summertime job.