At breakfast the family argues about Nathan, who stayed out late and appears to be acting to provoke their mother. Lucas blames himself for not stepping in, but his mother says it's not his fault and their father tells them to ignore Nathan and let him fend for himself. Later, after a casual chess loss where the father praises Lucas's improvement, an acrid smell fills the house. Family members stop and ask, "Do any of you smell that?" The episode ends with the foul odor unexplained and the family's alarm unresolved.