Digimon Adventure tri. Part 3: Confession

A mid-series installment that escalates the stakes through infection and isolation, balancing action with character bonds and mounting dread.

After seeing Meicoomon's abrupt transformation and killing of Leomon, Agumon and the other Digimon are kept isolated in Koushiro's office in order to prevent them from infection, but signs of infection begin to appear in Patamon.