A mysterious being travels from the galaxy to Mars. After losing the "heart" engraved in his chest, he is haunted by recurring dark nightmares, yet drawn onward by the presence of water. Alone in the bathtub, still wearing his spacesuit, he becomes lost in masturbation—a scene symbolizing his trembling soul caught between loneliness and hope. Despite being drenched by the rain, he is fated to fall in love with someone. With her, he experiences an intensely passionate sex that melts their bodies together. Wandering through an alien journey, this sensual adventure unfolds as he seeks to rediscover the "heart" buried deep within his soul.