困于七年前一桩意外的两人再度相遇，美云（辛芷蕾 饰）与葆树（张颂文 饰）开始了一段爱恨交织、扭曲而痛苦的共生关系。在美云试图借其峰（冯绍峰 饰）展望新的未来时，却发现自己仍深陷旧日漩涡。那些关于情与债的执念，再度将所有人推向命运的十字路口……
明朝大内密探零零零，惧妻如虎，一心为国效忠；可惜在其卧底生涯中，从没被委派任务。妻子雪儿，鬼谷子后人，略懂占卜皇相，触觉敏锐，略带神经质。一日，零零零被上司李义派往妓院“迎春阁”内，调查春药害人一事，零认为大材小用，迫于无奈答应，返家告之雪，雪大发雷霆，认为事非同小可即替零占卜问卦，得悉此行略带风险，零苦苦哀求，雪才应允其出征。零苦思之下，终以作《玉蒲团》一书为名，留在院内，芳得悉有外人混入，决往问个究竟，零欲辩难辩，终允书中女主角以芳为名，才可脱身。零在“迎春阁”内，又要讨好众人，又要写下众人的犯罪证据；又要面对珠、云的诱惑；又要担心雪随时因问卦不利的撞来；又要面对上司的压力，忙得不可开交，有甜、有苦、有血有泪。
This long-lost masterpiece of hardcore gay erotic cinema centers on a handsome young stud who rides his motorcycle through myriad sexual encounters, from a soccer game’s locker room to a phantasmagoric and deeply melancholy orgy. A labyrinth of all-male fantasies whose outstanding beauties always end up fading away while leaving their sensual protagonist dealing with his own loneliness, EQUATION was directed with supreme grace by the mysterious Dietrich de Velsa (aka Francis Savel/Frantz Salieri). A former painter, de Velsa was also the owner and artistic director of La Grande Eugène, one of the first drag cabarets in Paris. Years later, he collaborated with Joseph Losey on MR. KLEIN (1976) and DON GIOVANNI (1979). His one and only film, EQUATION TO AN UNKNOWN stands as one of the most extraordinary erotic films of all time. “The most melancholic porn film I’ve ever seen. It’s very sad, and aesthetically beautiful. Just a young man wandering through several depictions of love and choreographies of love-making; it’s like a ceremony, a ceremony of fantasies, especially the last sequence where the main character recalls all his previous fantasies, which come one by one around his bed and make love to him. I think it’s one of the most beautiful film sequences of French cinema.” –Yann Gonzalez
