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

本片和特吕弗的《四百击》同被誉为法国电影新浪潮的开山之作。身无分文的街头混混米歇尔（让-保罗•贝尔蒙多）从马赛偷了一辆小汽车，驶往巴黎的路上，他因超速行驶被警察逮住，为了脱身，他开枪打死一名警察，来到巴黎后，他躲进当记者的女友帕特丽夏（Jean Seberg）处（躲避警方的通缉之外，他还想方设法讨回一笔卖车赚来的钱）。帕特丽夏去报社时，遇到警长，对方要她一有米歇尔的消息就打电话相告。对米歇尔，帕特丽夏心态复杂，一面深深为他对一切都无所谓的劲儿着迷，一面却嫌弃他太吊儿郎当。