Saki is a single mother barely supporting her elementary-school-aged son with a restaurant job. Desperate for money, she joins an adult compensated-dating site and meets a vile man who gives her what he calls a powerful tonic. Her body immediately burns with drugged arousal, and sex under the aphrodisiac lets her forget her financial struggle. He gradually hooks her on the drug through messy, intoxicated sex until she returns without asking for money, begs for another dose, and ravenously sucks his cock, completely conquered into serving him for the pleasure and the drug.