One morning, Rebeca wakes up to discover that her weight has drastically increased without her experiencing any change in her appearance. As the story evolves, Rebeca, overwhelmed by her weight, that keeps increasing even more at each moment; tries to develop her daily life as usual, until it becomes completely impossible. From that moment on, Rebeca suffers a progressive deterioration that starts affecting the people around her.

The existence of a lonely figure in Mexico City is slipped uncontrollably throughout bodies every so often, making his essence travel through bodies of men and women. Boredom and hopelessness of this being are faced by the love for Luisa and the need to be with her. He starts a struggle to communicate that love via different faces and bodies until he may be with her in spite of his condition.

电影一开始，就是一颗新鲜头颅的血泪自白，自我介绍姓名年纪与职业后，鲜血逐渐渗开，染红半边银幕。接下来的故事，将由这颗头颅娓娓道来…。为了让马戏团继续经营，魔术师想出「断头台」压轴表演；当刀刃落下，这场演出也将成为他人生中的豪赌。全片宛如墨西哥版《黑色追缉令》，B级荒谬又魔幻，将神秘的墨西哥，搞成一个闹剧嘉年华。