Sex Mate: Two women's anticipated suicide journey turned into a physical terror... Mi-ran is a call girl who was raised in an orphanage without having been loved once in her life and sold herself several times to men. The more Se-hee struggled with the weight of life, the heavier it got. On her first day of work as a call girl, a terrible accident happens. These two women think they are abandoned by life and start off on a suicide journey.