A late-night supply search into an abandoned city triggers an encounter with the Invid, where the team is trapped in an underground train station. The tension takes its toll on the team, as Rand, Rook, and Lunk actually consider breaking away. The team's unity is rebuilt after they work to break out of the station. Annie, who has been disgusted with the way of life in Macgruder's tribe, appears to rejoin the team.