Miller Montgomery, a 25-year-old pastry chef, has been struggling with a creative block since she won the James Beard Award three weeks ago. While she’s working in a Miami kitchen, a line cook named Curtis grabs her waist, and she knees him in the groin. The head chef fires Curtis and apologizes, but Miller quits because she knows she can’t help his menu.

Miller calls her agent, Violet, and announces she’s taking the summer off. Violet panics about Miller’s upcoming Food & Wine cover feature and a fall consulting job in Los Angeles. Miller confesses her creative block, and Violet decides to spin Miller’s temporary absence from the culinary world as a desire for family time.

Miller drives to her father’s hotel. Monty is the field manager for the Windy City Warriors, Chicago’s MLB team. She reflects on how he became her sole parent at 25, gave up a promising baseball career to raise her, and only returned to coaching after she left home. She keeps traveling so he won’t feel obligated to settle near her. After riding the elevator with an attractive man holding a toddler, she finds Monty and announces she quit her job. He suggests she travel with him and the team for the summer. He notes that there’s already an exception to the rule against family members traveling with the team, which gives him an idea.

Monty summons Kai and declares he’s found Max a new nanny, his daughter. Miller walks in carrying two coffees, and she and Kai recognize each other with mutual dismay. Kai objects, citing her morning beers. Miller explains she was celebrating quitting her job. After a heated exchange about his uptightness and her qualifications, Monty asks Miller to step out. Alone, he vouches for her work ethic, promises to fire her himself if needed, and Kai agrees to give Miller one strike. Monty warns Kai not to get attached because Miller will leave at the end of the summer and jokes that he’s too young to be a grandfather.

Before the game, Kai learns his teammates are already excited about the attractive new nanny. When Miller arrives, Isaiah flirts, but she shuts him down and reminds him she’s the coach’s daughter. After Kai pushes Isaiah out, his old flirtatious side briefly surfaces when he asks if she will be watching his performance. She smirks and confirms she will. Max reaches for Miller and cuddles into her, which is rare for him with strangers.

During the game, Kai pitches through the seventh inning, but he’s distracted by thoughts of Miller and repeatedly has the team trainer text her to check on Max. She responds with dry humor, ribbing Kai’s pitching and commenting on his uniform. When teammates express excitement about the new nanny, Kai stands and delivers a stern warning to treat Miller with respect. Isaiah breaks the awkward silence with a joke, and Monty orders him to the on-deck circle.

While watching the Warriors play on television, Miller finds Max easy to care for and suspects Kai is the source of the prior nanny issues. Helping her dad by nannying Max feels like a direct way to repay him for his sacrifices. As she prepares dinner, she watches Kai pitch in the eighth inning and is impressed by his skill. She cuts Max’s toast into a dog shape, which thrills him. After receiving Kai’s eighth check-in text through the trainer, she sends a sarcastic reply about giving Max whiskey, and Kai texts back that she’s fired. Miller concludes that Kai is an extremely overbearing parent.

Kai rushes back to the hotel after the game and finds Max sleeping peacefully. Miller teases him for rushing home in his uniform and tells him his controlling behavior has made her reconsider the summer arrangement. She calls him out for making Monty’s job harder by constantly firing nannies. When Kai deflects by questioning why she’s never been around before, Miller explains she stays away so Monty can have his own life. She shows Kai a video of Max excitedly watching him on TV and then cuddling her. The sight worries him, as he fears Max growing attached to someone who will leave.

Hurt by Kai’s ingratitude, Miller announces she’s quitting. Kai blocks the door, and as he reaches for her, he accidentally grabs her breasts. They freeze, and Kai apologizes. She tells him the arrangement won’t work and advises him to be less controlling. Kai watches her leave, filled with regret for ruining the situation for both Max and Monty.

After a 20-hour drive from Miami, Miller arrives at Monty’s Chicago apartment to placate him before resuming her plan to head west. When she says that Kai is overbearing and that she’s been ignoring his calls, Monty defends the pitcher. He explains that Kai practically raised his younger brother and tried to retire from baseball the very next day when Max’s mother abandoned him. This softens Miller’s opinion of him considerably. Monty says he doesn’t want Kai to retire early and asks Miller to give him another chance, believing she can help him find a better work-life balance. Miller agrees to think about it. Monty cautions that if she stays, she must not let them grow to depend on her only to leave, as she always does. Miller jokingly rephrases his warning as an instruction not to have sex with his pitcher, and Monty agrees.

On Sunday, Kai takes Max to breakfast at the home of his friend Ryan Shay, an NBA team captain, along with Ryan’s fiancée Indy, NHL defenseman Zanders, Zanders’s pregnant fiancée Stevie, and Zanders’s teammate Rio. Ryan and Zanders encourage Kai to vent about single fatherhood, and he unloads his frustrations about constant guilt, terrible children’s shows, and the anxiety of balancing baseball with parenting. Ryan observes that Kai has gone from cheerful to grumpy over the past six months and advises him to learn to accept help. Ryan and Indy reveal they had a bet on when Kai would fire his last nanny and that Ryan won.

When Kai mentions he hired someone new in Miami, Rio asks if she’s single, and Kai warns everyone to stay away because she’s Monty’s daughter. Ryan intuits that Kai must like Miller or he wouldn’t have hired her. Kai denies it and admits she already quit, confessing he drove her away because Max had grown attached too quickly. Zanders predicts Kai will end up sleeping with her. Despite feeling isolated at times, Kai is grateful for his found family and hopes Monty can convince Miller to return before his game that night.