"Before, we were merely dabbling on the edges of pleasure and pain. We were amateurs, dilettantes. But tonight, we will truly embrace the darkness within us."

Annie is an orphan, but she has finally escaped the hated orphanage. Instead, she has been taken into the service of the commanding Dr Thorn, her former headmaster, and now lover. But Annie knows that he has taken her into his home on one condition - that they continue their experiments into the nature of pleasure and pain.

Locked into an infernal machine of the Doctor's own devising, gagged and blindfolded, Annie must decide whether her desire is the match for his depravity, or whether this time, his sadism has gone too far...