In a pre-Sundance Film Festival deal, Amazon Studios has bought U.S. rights to the Rachel Weisz-Michael Shannon drama “Complete Unknown.”

The film, directed by Joshua Marston (“Maria Full of Grace”) from a script he co-wrote with Julian Sheppard, centers on a couple whose life is unraveled when a mysterious former love — portrayed by Weisz — reappears in the man’s life. Kathy Bates and Danny Glover also star.

Shannon portrays a character who hosts a dinner party where one of the guests brings a date who refuses to acknowledge their past history. He follows her into the night after she makes a quick exit.

“Complete Unknown” will make its world premiere at Sundance on Jan. 25. Lucas Joaquin, Jay Van Hoy and Lars Knudsen produced; Robert Halmi Jr. and Jim Reeve executive produced.

CAA and WME repped the filmmakers.

The news was first reported by Screen.