Recently laid-off forensic accountant Brian Jennings struggles to adjust to life as a stay-at-home dad for his stepson Lucas, who is bullied at school for being effeminate and uninterested in sports. While his wife Emily returns to work at the law firm, Brian hopes to help Lucas make friends and arranges a playdate with Jeff Eamon, a charismatic and hyper-athletic stay-at-home dad new to the neighborhood, and his son CJ.
What begins as an awkward afternoon at Buckee Cheese, an indoor playground, quickly spirals into chaos when a team of armed mercenaries attacks, forcing the group to flee in a stolen minivan amid car chases and playground skirmishes. Jeff Eamon reveals he is a disgraced former Delta Force soldier who discovered CJ locked in a top-secret facility during his night shifts as a security guard, mistaking him for a captive child and breaking him out. Pursued relentlessly, the group seeks refuge at Jeff’s estranged father Gordon's house, but he refuses to help, highlighting Jeff’s abandonment issues.
Interrogating a facility employee Galifianakish, they learn the shocking truth: CJ is the first successful clone of Jeff, created by eccentric billionaire scientist Simon Maddox and Colonel Kurtz. Kurtz views Jeff as the perfect soldier—tireless and skilled—but flawed by excessive empathy, exemplified by his court-martial for refusing to kill an innocent child (who was an unwilling suicide bomber) during a mission. Under the guise of routine drug tests at the facility, they harvested Jeff’s DNA to mass-produce emotionless supersoldiers incapable of PTSD or moral hesitation, aiming to revolutionize warfare by replacing human recruits.
When Maddox’s henchmen threaten Emily’s life, Brian betrays the group by luring Jeff into a trap, allowing CJ’s recapture. However, Brian redeems himself by aiding Jeff’s rescue mission. Following a GPS signal from Lucas’s phone (hidden in CJ’s jacket), they infiltrate a second facility swarming with feral CJ clones. Amid fierce battles, Maddox orders CJ to kill Jeff with a crossbow as a final test of his emotionless programming. CJ rebels, shooting Maddox instead and embracing his “found family,” proving clones can develop humanity through bonds.
In the climax, Brian crashes a car as a distraction, enabling Jeff to defeat Kurtz. Jeff detonates explosives he stashed in the facility, destroying the clones and apparent operation core. The four— Jeff, CJ, Brian, and Lucas— walk away from the explosion. Brian and Lucas affirm their bond, with Lucas declaring Brian the best dad. In a mid-credits scene teasing a sequel, Jeff and CJ arrive at Brian’s home at 2 a.m. for a sleepover, revealing their house was burned to the ground by a new group of pursuers, implying Maddox and Kurtz’s global cloning network persists.
