The Guardians have been trying to continue saving lives as they always have but stress of parenthood is causing Kovin and Kelryn to behave erratically. The others think they're going to snap until news of a new group of digidestined reaches them. Ordinarily they'd ignore it, but it's Agumon and all the other digimon killed in episode 1. The Alpha Guradians split up to handle this and find themselves seeing peices of a large conspiracy.
(Episode 4 follows one half of the characters, episode 5 the other half. Meaning both episodes take place at the exact same time, just in different places)