Shell-shocked from recent events, the team rallies and travels to California to stop a pair of brothers (guest stars Jamie Bamber and Riley Smith), one of whom may be the Horseman of Famine, from committing a fateful sin.

The limits of each Messenger's power are put to the test as they work together to free a key player from a secret government lock-up, and Joshua's latest vision points to the appearance of a treacherous new enemy.