During the 1920s, 28-year-old, Beatrice Corbin just wants to keep her general store afloat and keep an eye on her 18-year-old sister in the small town of Azoma, Louisiana. Until, she is approached by the Devil, Frank Charbonneau, and learns that her sister will be murdered. To save her sister, she makes a bet with him, staking her soul on the wager that she can find her sister's would-be killer in seven weeks.