It's a family of adult siblings forced back under one roof after their dad dies, so the key characters are really the whole Foxman clan. You've got Judd, the narrator, who's just found his wife cheating on him with his boss—his life is in shambles. His older brother Paul is tense and running the family business, married to a woman trying to get pregnant. Their sister Wendy is stuck in a dead marriage, and then there's Phillip, the youngest, a mess of a man-child with a much older therapist girlfriend named Tracy. Their mom, Hilary, wrote a parenting book and is... a lot. The dad's death is the catalyst, but the book is just these deeply flawed people circling each other for a week, dredging up old rivalries and secrets.
Honestly, the characters outside the family barely register for me. Judd's ex-wife Jen, the boss, a few neighbors—they're just props that highlight how trapped everyone feels in their own history. The core dynamic is all siblings. Paul's resentment, Wendy's sarcastic armor, Phillip's chaotic energy, and Judd's depressive numbness. It works because they all feel real and painfully familiar, not like caricatures.