The fourth episode of "Sexy Beast" kicks off with Teddy Bass, nestled in the opulence of a Spanish mansion, engaged in a hush-hush conversation with his associate, Roger Riley. They are mapping out a strategy involving Gal and Don, who soon join them. Roger Riley is introduced to Gal and Don, teasing that all will be unveiled during dinner, while Teddy Bass issues a stern warning: don't mess this up.
Gal, enchanted by Spain, expresses his fascination with the place, imagining himself living there indefinitely. Conversely, Don harbors a deep disdain for the country. As they stroll through the town, tensions flare between Don and Gal, drawing the attention of two local police officers. The situation escalates when Don becomes physically aggressive, prompting the officers to intervene and attempt to arrest him. Don retaliates with a headbutt, and Gal leaps into the fray to defend him. The duo then bolts and hops onto a passing bus.
After disembarking, Gal and Don find themselves with a two-hour wait for the next bus. Seeking refuge in a beer, they unwind momentarily. Meanwhile, the police officers, hot on their trail, arrive at the mansion to investigate. Teddy Bass, with a knife drawn and ready to strike, is momentarily distracted when the officers receive a tip-off about Gal and Don's whereabouts.
As Gal and Don await a taxi, Gal reveals that his sister, Cecelia, visited him. He confides that she expects them to do her bidding, but he's skeptical about the wisdom of complying. Suddenly, a football is kicked at them by some children, and the men, caught off guard, end up joining in the playful fray. However, their fleeting moment of levity is shattered when the police arrive once again, hot on their heels.
Gal and Don find themselves separated but manage to elude the police, agreeing to reunite at a specific church as their rendezvous point. As night begins to fall, Gal finds himself lost and anxious, while Don steadfastly navigates his way towards the sacred sanctuary. Eventually, Gal arrives at the church, where he's relieved to find Don awaiting. Together, they turn back on their heels, having inadvertently missed their scheduled encounter with Roger Riley. Teddy Bass, displeased with their absence, adds fuel to the fire.
Instead of their intended meeting, the boys accidentally stumble upon a lively party, where they lose themselves in the rhythm, dancing tirelessly through the night. The following morning, as the sun rises over the shimmering beach, Gal and Don walk with heavy heads and the remnants of a hangover. Don opens up to Gal about his troubled relationship with Dee Dee, but their conversation quickly turns sour when Don derogatorily labels her.
Teddy Bass unexpectedly appears on the beach scene, pointing a gun menacingly at Gal and confronting him about a security guard they had planned but failed to eliminate. Don intervenes, boldly taking the blame for the whole idea. Teddy, unperturbed, reveals that the guard is now deceased regardless and informs them that Roger is discontent with their missed meeting.
Ultimately, Gal and Don confront Roger, who lays out the details of their impending heist: a daring plan to steal a diamond known as the Eye of Bombay, targeting a corrupt politician. Roger queries their commitment, and they assure him of their capabilities. Teddy emphasizes that there's no turning back. Suddenly, the police arrive on the scene, but in a dramatic twist, one officer turns his gun on his colleague, shooting him before he can apprehend the boys, who are shielded by Roger Riley's influence and protection.
