A drought hits San Lupo. A nomadic group led by Charlie, comes. They know how to find water and want to trade. Ish has his doubts, but chooses to accept help. They strike water. But a trade might not be enough for Charlie...

Ish catches Charlie assaulting Evie. San Lupo must decide how to punish evil. But will Charlie and his people accept their judgement? The virus returns. Joey falls ill, and Ish feels humanity’s future hanging in the balance.