在电影“蒙大拿的天空”,当养牛的亿万富翁杰克过身时,他把面积很大的蒙大拿大农场留给他的3个女儿,她们都是同父异母的姐妹,而彼此素不认识。根据遗嘱,她们必须在大农场居住一整年才能得到遗产。三姐妹都知道这个强迫式家庭重聚,并不是在公园内散步那么简单,可她们想不到有人决心要搞破坏…Cancer-deceased stock trader Jack Mercy's funeral is where his three daughters Willa, who lived on his Montana cattle ranch, shy Lily and Hollywoodian Tess, from different mothers, meet. The notary and neighbor Ben McKintock, who fancies Willa, are to supervise the surprising last will: the girls only inherit 1/3 each of the $24,000,000 estate after cohabiting there for a year. Tess and Munroe County's gentleman sheriff Torrence, a hunky vet, fall in love. So do Lily and Adam Wolfchild, a half-blood ranch-hand, but her abusive husband, ex-con Jesse Carne, stops at nothing to get her back. But is he the one who viciously kills ranch animals and ranch-hand Pickles?