In Los Angeles, David Cuevas lives with his wife Alexis and their two children. As Alexis’ family prepares for her niece’s quinceañera, David arrives at his auto electronics store, where he employs his cousin Lupe. Joined by his partner Creeper, David receives a payment from Victor, a newly promoted gangster; David and Creeper are “tax collectors”, enforcers who collect a cut of the profits from 43 local gangs for their boss Wizard, who runs his far-reaching criminal enterprise from prison. David and Creeper visit David’s uncle Louis, confirming Victor’s payment, and collect other gangs’ payments throughout the city.
Learning that a member of his crew has abducted a member of the Bloods for sleeping with his girlfriend, David rescues the Blood, leaving his kidnapper to be beaten for nearly inciting a gang war. David and Creeper return the man on peaceful terms to the Bloods’ leader, Bone, and Alexis summons David to intimidate another family out of buying the dress her niece wants. Alexis discovers Victor’s payment is $20,000 short, and David and Creeper track him down. At gunpoint, he admits to skimming the money to pay for his daughter’s leukemia treatment; David, a devoted family man himself, lets Victor keep the money.
David and Creeper visit an associate named Venom for a $200,000 payment, but are met by Conejo, a rival gang leader who declares that Venom now works for him, forcing them to leave empty-handed. David informs Louis, who explains that Conejo was a rival of Wizard who retreated to Mexico, earning a reputation for ruthlessness. Creeper is eager to eliminate Conejo, but Louis requires a vote from fellow gang leaders. Alexis reassures David of her love for him and their life together, and David struggles at his Brazilian Jiu-Jitsu class.
During the quinceañera at the Cuevas’ house, Louis leaves to meet with Conejo. David’s sister Delia asks if he has spoken to their father, which David denies, and he and Alexis share a dance. Conejo’s underling Gata arrives and orders David and Creeper to join the meeting, where Conejo presents them with Louis’ severed head and hands. He invites them to join his organization for the power and recognition Wizard has denied them, but David and Creeper leave in silence. Planning retaliation, David’s men urge him to leave town. As Conejo performs a ritualistic sacrifice at his hideout, Gata and Conejo’s heavily armed men attack David’s shop with a pipe bomb, killing David’s men and capturing Creeper.
David escapes and rushes his family to safety, but is forced to watch by video call as Gata smashes Creeper’s legs with a hammer before Conejo stomps him to death. Leaving Alexis at a hotel to send their children with her sister Favi, David digs up a stash of over $1.5 million from Lupe’s yard. Returning to the hotel, David finds Alexis dead. Stricken with grief, he discovers Favi does not have his children; Conejo, having abducted them and killed Alexis, calls David and gives him two hours to meet with a ransom. David goes to Bone, who gathers volunteers to rescue his children.
Raiding a drug house, they interrogate one of Conejo’s men, dragging his face along the ground from a moving car, and kill him after finding an address on his phone. They arrive to find David’s children safe, with no one there but Conejo’s grandmother, who gives up his location. At Conejo’s hideout, David strangles a guard, while Bone is nearly captured but kills two members of Conejo’s crew. Bursting into Conejo’s room, David kills Gata, but Conejo gains the upper hand as they brawl in the bathroom. Drawing on his Brazilian Jiu-Jitsu lessons and memories of Alexis, David overpowers Conejo and kills him with a broken sink.
As Bone drives him to have his wounds treated, David asks him to pull over and calls Wizard, who is revealed to be his father. Refusing to follow in his footsteps, David hangs up; touching his rosary, Wizard asks for forgiveness.