银蝶候鸟是一部剧情,动作片，不良少女团伙绯樱会番长樋口奈美（梶芽衣子 饰）因杀害某黑帮分子而被判入狱。由于死者妻子小枝子（青柳三枝子 饰）的求情，奈美得以在三年后重获自由，返回家乡东京。在此期间，她借住在父亲好友原田（田中春男 饰）开设的台球馆，并在布兰科俱乐部担任女招待谋生。经黑道小喽罗东隆次（渡瀬恒彦 饰）打听，奈美终于找到患病卧床的小枝子，并向她当面赔罪。另一方面，黑帮组织大和田兴业以抵偿欠款为名图谋吞并布兰科，遭到奈美和隆次的大哥松平绅之助（梅宮辰夫 饰）的阻挠，贪婪的大和田（南原宏治 饰）必欲除之而后快…… 　　本片为梶芽衣子加入东映主演的第一部作品。

Nami, a young woman, is released from the prison after serving 3 years for killing a man. She becomes a hostess to support a sick woman thanks to whom she was released before her term. While trying to manage her own life and helping the sick woman she becomes involved in a Yakuza scheme to take over the bar she works for. She has to use her wits and skills at pool table to save the bar and her own life.