Story line obtained from some of the descriptions given on the website
Powershotz.com

Kidnapped Lexi must pose for the photographer in bondage in order to earn her freedom. She stubbornly refuses.

After being left bound to the chair for an extended period of time, Lexi still refused to strip off her clothing and pose in nude bondage for the photographer. So he makes her incarceration more uncomfortable by ball gagging and blindfolding the whimpering young girl.

Blindfolded and ball gagged Lexi is found laying on the floor crying. She tried to get loose and got lost instead. Now the photographer picks her up and sets her back on the chair. Still chained about the neck, broken and whimpering, Lexi agrees to take her top off and pose. But the photographer still refuses to release the poor girl.

At last Lexi agrees to pose topless and bottomless for the photographer. She lets him have his way with her, and after he finishes shooting, he give her the key...embedded in a block of ice. The block slides away and she cannot reach it. When the photographer returns, he strips her nude, photographs her again, and leaves her alone to melt the block of ice with her body.

After which, he still refuses to let her go and just takes her.
Just an idea. Fill in the details as you wish.