Cowboy drifter Rick Cooper is on the run in the California desert when he meets Gladys Ryan, an eccentric widow who offers him a ride in her classic 1970 Mustang. Before long she convinces him to accompany her to Northern Ontario to help refurbish her hunting lodge, promising him a share of the upcoming season's profits and hinting at more. The offer is too good to pass up. Rick takes to life in the bush, working hard to make the lodge successful. In his free hours he hunts birds, reluctantly taking Bucky, Gladys' ancient golden retriever along with him.
But when the lucrative season comes to an end, Gladys refuses to share the profits, instead offering the hired man a few thousand dollars in wages. In the middle of a drinking bout, an argument ensues. Rick shoves Gladys and she falls and hits her head and dies. He takes her body into the remote bush and disposes of her trademark Mustang, telling anyone who asks that she has gone off on her annual snowbird vacation. No one seems suspicious and it looks like the perfect crime. Rick seems to have it all figured out...except what to do with Bucky...
When Sandra Sinclair, recently widowed and the mother of twelve-year-old Jane, meets wealthy lawyer Joe Gillette, he wins her over with his kind and conscientious attitude. Falling in love faster than she ever thought possible, Sandra agrees to marry. But soon after they move into their new home, things begin to change, and Joe's controlling behavior causes her to question her decision. When her new husband becomes seriously abusive, Sandra decides that she and Jane must leave.
When Joe makes it clear that he will not just let her walk away, Sandra discovers that it's quite likely that he arranged his first wife's death, and that she is now part of his "contingency plan." She soon realizes that even the law is no defense against this meticulous and egotistical man. Fleeing to an old family cabin on a remote lake, mother and daughter prepare to live off the grid. And when Joe tracks them down, Sandra must come up with a contingency plan of her own.