We meet Jay, an older grandfather that recently re-married a much younger wife, Gloria. Along with Gloria comes her son, Manny. Jay starts to feel too old when he's mistaken for Gloria's father at one of Manny's soccer games by one of the other dads. Jay decides to head to the mall to start dressing hipper, while Manny decides he's going to romance a much older employee. Though Jay tries to stop poor Manny from embarassing himself, he goes for it anyway and Gloria tells him he has to start encouraging him more.
Meanwhile, Claire and Phil are struggling with parenting their kids as well. Phil is trying so hard to be the kids' friends rather than a parent that when Luke ends up shooting his sister with a BB gun, Phil is not disciplining him to Claire's liking. Claire is busy parenting Haley, their oldest teenage daughter, who's busy having a study date with a much older boy.
The real focus of the epiosde is Mitchell and Cameron who fly off to retrieve their daughter, Lily, they've adopted from Vietnam. Cameron surprises Mitchell by inviting his sister, Claire, and father, Jay, over to meet the newest addition to the family. Although Jay is initially hesistant of the guys adopting, he welcomes the new addition to his Modern Family.