没有血缘关系的小唯和小爱姐妹俩，在父母的暴力和冷遇中结下了深厚的情谊。因此当姐妹俩察觉到她们会因父母的离异而不得不分开这个事实时，决定离家出走。两个人开始了在东京的相依为命的艰难生活……

　　该片刻画了在闭塞且残酷的社会中，追寻幸福、积极生活的两姐妹形象。由通过试镜入选的新人寉冈萌希、寉冈瑞希担纲主演，此外活跃于日本电影界的实力派演员菅田俊、榊英雄等也参与该片演出。导演则是不断有新作问世、备受关注的才俊内田英治。

Teenage stepsisters Yui and Ai form a close bond as a result of the neglect and abuse from their respective parents. Fearing separation from each other when their parents plan to divorce, they run away together to Tokyo and, in order to survive steal a briefcase which they later discover belongs to the yakuza. This puts them in great danger. Tanida, a kind-hearted yakuza member, comes to their rescue and becomes the protective and loving parent figure they never had. But for how long will he be able to save them from harm?