In the year 2115, body swapping was a recreational reality. A simple electronic transfer was all that was required to give another person the opportunity to live in your body for a limited period. The big take up was with personal trainers. Well if you are wealthy and overweight, why sweat in a gym yourself when you can get someone else to do the hard work. Pretty forties working wife Dana was in that category. She'd let herself get a bit, well plump! Talked into it by her best friend, she found a personal trainer and gave it a go. What she couldn't know is that gorgeous, high-energy trainer Houston was a nymphomaniac who couldn't say no to any new sexual opportunity. What happen next was a chain of highly charged sex escapades with the girls in each others' bodies.