It's the first day back at school for the kids and, at the Dunphy house, Phil oversteps when he misreads how Claire is coping with an empty nest. Over at Jay's, he and Gloria are in disagreement over Manny's interesting choice of outfit for his first day of class, and Mitchell and Cameron freak out after Lily gets her first bump on the head.

When Phil and Luke embark on a discovery expedition underneath the house, Phil tries not to let his fear of the dark and of creepy crawlies get the best of him. Meanwhile, Claire takes a nervous Haley to the DMV for her driver's test, Manny's sudden illness before a friend's amusement park birthday party makes Gloria suspicious, and Cameron and Mitchell invite Lily's pediatrician over for what turns out to be an anxiety-ridden brunch.