Jim Bennett, portrayed by Mark Wahlberg, is an academic in Los Angeles, grappling with a crippling addiction to gambling that stems from his all-or-nothing perspective on life. After attending his grandfather’s funeral, Jim finds himself at a high-stakes gambling den, having been disinherited by his father, Jonathan. He initially enjoys success at the blackjack table, winning $80,000 swiftly, but the tide soon turns against him. In a desperate bid to cover escalating debts, he borrows $240,000 from Lee, the owner of the gambling ring, and an additional $50,000 from Neville Baraka, portrayed by Michael K. Williams, a loan shark who, intrigued by Jim's gambling prowess, offers him a stake with steep interest.
Despite a promising win of $160,000, Jim’s ambition leads him to gamble recklessly on a game of roulette, risking it all on a single bet, only to face defeat when the wheel lands on red instead of black. With a death threat looming over him, as Lee demands repayment within seven days, Jim's peril escalates.
Amid this chaos, he notices a spark in his student, Amy Phillips, played by Brie Larson, whom he recognizes as a potential literary talent after previously encountering her as a waitress at Lee's establishment. Amy harbors an eagerness to connect with Jim, but he instinctively attempts to keep things professional, despite her persistent advances.
As pressure mounts, Jim contemplates seeking further financial assistance from Frank, a loan shark embodied by John Goodman, who offers to lend a substantial amount at exorbitant weekly interest, demanding Jim admit, “I am not a man.” Ultimately, Jim turns to his mother, Roberta, played by Jessica Lange, convincing her to give him money to settle his debts but squandering it at the casino while on a date with Amy, who is both mesmerized and drawn into Jim's high-stakes world.
With just days remaining until his deadline, Jim finds himself in a dire situation when Baraka kidnaps him, threatening Amy’s life unless he secures a point-shaving victory for his student Lamar. Forced into a morally dubious scheme, Jim persuades Lamar to manipulate the outcome of a basketball game to save Amy.
Utilizing funds from Frank to gamble on Lamar’s game pays off, and Jim gains enough to settle his debts. He then cleverly sets up a risky wager on a single roulette spin, which could potentially clear both Lee and Frank’s claims against him. Against all odds, he emerges victorious, defiantly rejecting Frank's offer to return excess funds.
With a new lease on life, Jim, now debt-free but financially ruined, races through the city to reunite with Amy. He’s left with the realization that though broke, he’s finally free from the chains of his gambling addiction.
