A man with no memory of his past awakens as the Master of a lavish mansion, where he serves as a trainer of slaves under the direction of the enigmatic Lady Regina. After taking in a desperate woman named Lita, he subjects her to a rigorous and degrading training regimen to prepare her for a competition. However, as he suffers from mysterious headaches and fragmented visions, he begins to suspect that his identity is being intentionally suppressed by the mansion's residents through medication and manipulation.