Monica is an ordinary young woman who loves to party, especially on Halloween. But when a UFO unexpectedly phases her up into their ship for experimentation, everything changes. Her holiday cow costume works against her as the aliens fail to understand the holiday’s conventions, and decide it will be necessary to ‘correct’ her form . . .

The final chapter, wherein Maddie finds out Leila's pregnancy is kind of hyper, and might take as little as 8 weeks. Dana tries to cope with her transformation to a weredog, but by moonrise she's entirely sheepdog. Cassie agrees to Sally's plan to seduce more of their teammates, if only to distract the girl from continuing to dominate her with petplay. And then, Leila's animalistic features spread to the other women she's slept with when her fourth trait triggers.

Prav is a mercenary who has been given a cushy, well-paying job: all she has to do is escort the mysterious religious acolyte Kala to a newly-founded village in the hinterland, no questions asked. Kala is meant to be a ‘Bearer’ for the village, whatever that means, but when a magical storm triggers this function early, Prav is astonished to find her charge growing not just in height, but around her belly as well. The mercenary must get Kala to the village quickly before she gives birth.

Cassie uses the remote and Salalai and gives the girl a mesmerizing pussy, while Maddie tries to come clean with the pet girls and explain matters, to mixed results. Kara, Kat, and Hoshi work through their feelings about the revelations, but their animal instincts ultimately rule the day. Maddie and her family finally locate a user's manual of sorts, which makes them aware of what's to come. Dana transforms in a park and sets off an orgy, and Cassie finds herself doggishly submitting to Sally.

Maddie and Leila visit Tina and Ruth, and much milking ensues. Cassie makes a wager and wins it, involving some public sex and a new permanent nudist. The petplay ladies gather at Jenny's home for a lesbian orgy, but they get gate-crashed by the man she and Hoshi met at the BDSM club, toting a gun and threatening blackmail and rape. Madelyn hatches a desperate plan that leads her to a kind of enlightenment.

Tina and Ruth bond, while Hoshi and Kara ponder petdom while visiting Jenny and Allie, who are making plans for a petgirl orgy. Dana freaks out after returning to her human form and flees with Miguel, while Cassie humbles herself to Maddie in exchange for borrowing the device. None of them realize that fourth level traits happen automatically, and Maddie gets a new kink while she sleeps.