Soon their business relationship leads to romance as their mutual attraction to one another transforms into a bizarre game of sexual upmanship with each encounter becoming more perverse.

In their background stories, Michelle is a psychoanalyst who is married to an unattentive businessman, named Frank Keys, who is always traveling out of town on business trips.

Michelle and Peter buy each other a car to replace their respective ones that were damaged by the accident, and soon set out play-acting various roles to stimulate their growing affair.

Peter shows up play-acting as a robber arriving to rob the place and takes Michelle away as his hostage which leads to him having rough sex with her in a tunnel.

In a final game, they both attempt to re-enact the car accident that led to them meeting in the first place and this time, both of them deliberately crash head-on into each other and the screen goes black – leaving it ambiguous if either of them will survive the impact.