This is the story of how a 12 year old boy became a 4 year old girl over the summer thanks to his older sister.

When Tristan is at a college party, he meets up with a girl from his English class, Beth. She invites him to "hang with the girls" and she starts to slowly get a sense he's not like all the other guys. After staying the night at Beths apartment, she reveals his deepest desires, and then with the help of her friend Cadence, fulfills them. Soon Tristan is thrown into a world he never dreamed of.

A sequel to the quite popular science fiction age regression novel - Age regression diaper 3000.