Alex Stillman is a dedicated law student who enjoys playing poker, both online and in private games. His journey begins when he participates in a prestigious online tournament that culminates in a live televised final table. However, Alex faces a tough challenge when he is the first to be eliminated, outplayed by the formidable professional player, Karen "The Razor" Jones. Watching the broadcast is the retired player, Tommy Vinson, who sees potential in Alex and decides to reach out to him. Tommy tracks down Alex during a cash game and offers his business card, which Alex initially declines. Impressed by Tommy's expertise as he accurately recounts Alex's previous hand, Alex changes his mind.
Once they connect, Alex spends several days with Tommy, diving deep into the world of poker by watching old videos and learning how to read other players. Tommy proposes a lucrative partnership: he will financially back Alex in poker games, and they will split the earnings 50/50. Confused about why Tommy doesn't play himself, Alex learns that Tommy has been away from the game for two decades. After hitting rock bottom, including nearly losing his house and wife, Tommy made a vow to stay out of poker forever.
Tommy takes Alex to Las Vegas for a high-stakes cash game, where he watches Alex face some difficult hands, resulting in initial losses. Sensing a flaw in Alex’s gameplay, Tommy steps in to point out a tell and helps him adjust. With newfound insight, Alex makes a comeback and ends up cashing out with a profit. To help Alex loosen up, Tommy encourages him to approach a striking woman named Michelle at the bar. Despite his nervousness, Alex successfully asks her out, leading to an eventful night.
Next, Tommy wants to enter Alex in a tournament in Louisiana, but Alex has commitments to his father's law firm. He persuades his father to grant him additional time, pretending to go on a trip with a friend. The duo heads to the tournament, but Alex falls prey to distractions and fails to maintain focus, leading to an early exit from the tournament. Back home, Tommy faces his wife's anger over the financial risk he has taken. Although he admits to supporting Alex, he insists that he hasn’t played. Helen packs her bags and leaves, further complicating Tommy's personal life.
Returning to Las Vegas for another tournament, Alex initially thrives but becomes anxious when faced with a tough female competitor. However, he manages to get back on track, ultimately finishing in the money and pocketing $120,000. Just when things seem to be looking up, Alex attempts to reconnect with Michelle but discovers she is involved in a relationship with another man. After an emotional confrontation, he finds out that Tommy had arranged for Michelle to help him relax, fueling his anger. Disgusted, Alex leaves his winnings for Tommy and cuts ties with him.
When Alex goes home, he faces his parents' ire for prioritizing poker over work. A heated argument ensues, during which he throws his $60,000 winnings at his father. However, the shock of his success leads them to reconsider, allowing him to compete in the World Poker Tour in a few weeks. Tommy, feeling unbound by his promise to never play again, signs up for the tournament as well.
As they battle through the rounds, Alex quickly builds a sizeable chip lead, while Tommy gradually works his way up. Both reach the final table, and tension mounts as their families come to support them. In a climactic showdown, they find themselves as the last two players standing. The final hand concludes with Tommy eliminating Alex using a pocket pair of jacks. Later that evening, a reflective moment arises when Tommy confronts Alex about their last hand. Alex acknowledges Tommy's assumption—that he had a weaker hand than Tommy—revealing a poignant moment where he folded to allow Tommy to triumph in the game he cherishes.
