海妮（拉蔻儿·薇芝 Raquel Welch 饰）和丈夫吉姆是茫茫西部平原中的一对牧马人，夫妻两人相依为命，彼此之间感情非常的恩爱。一天，强盗埃姆特（欧内斯特·博格宁 Ernest Borgnine 饰）、弗兰克（杰克·伊莱姆 Jack Elam 饰）和罗福斯（斯特罗瑟·马丁 Strother Martin 饰）“造访”海妮的家，他们残忍的杀死了吉姆，夺走了他们所有的财产，并且一把火烧掉了海妮苦心经营的家园。绝望和悲痛之中，海妮发誓要为丈夫报仇。她遇见了一个名为布瑞斯（罗伯特·考普 Robert Culp 饰）的男人，布瑞斯是枪技精湛的神枪手，在海妮的苦苦哀求之下，他同意教授海妮枪法。很快，海妮就展现出了超出了布瑞斯预期的天赋。

Abigail grieves her father's death, feeling isolated. Matt's life disrupted by brother's return. Their paths intersect, tragically shaping their journeys. A character-driven exploration of loss and upheaval.

　　Dragonfly is about unlikely friendships. Seeing a lack of care, COLLEEN decides to care for ELSIE. Never sure of her motivations, Dragonfly is a chillingly tense narrative that will make you question your preconceived judgements.