Oxygen

About Oxygen: When housewife Frances Hannon is abducted and buried alive, detective Madeline Foster is brought in. With only 24 hours before Frances' oxygen runs out, Madeline pursues the trail laid by a killer calling himself Harry Houdini. After capturing him, Madeline brings Harry back to the police station, but is unable to get him to confess where Frances is buried. As time runs down, Harry gets inside the head of unstable, alcoholic Madeline.

A killer. A cop. Someone's... buried alive.