Headfirst is a black comedy about a single mother with anger management problems and her teenage daughter who is always in trouble at school. With yet another school comes a new teacher and a blast from the past for the mother. Before long, an accidental pickpocket and a notoriously lousy storyteller teams up with this one dysfunctional sort of a family. Nothing is the same anymore. Headfirst is a story about missing teeth, strange friends, hidden dreams and long-gone love. And about a hare.

　　笃信“离婚是恋爱最自然、最顺理成章的结果”的珊娜为了证明这句话，开始调查不同人群的婚姻状况，总结离婚诱因，由此引发连场闹剧，直至自己也陷入恋爱，“毁婚”规律也慢慢瓦解。影片以黑色幽默剖开性与爱、婚姻与幸福关系的神秘面相，处处是令人忍俊不禁而又发人深省的荤味笑料。

Tiina decides to reconnect with his aged and bohemian father living alone. With her reluctant daughter and new husband, they move in and start to renovate the old house. However, neither the renovation nor facing the past is effortless.