Yoshi's struck by a contagious virus which seemingly affects humans, though Digimon remain immune to its effects. With Marcus and Thomas gone for supplies and Lalamon alone nursing Yoshi, Keenan and Falcomon take advantage of the opportunity to get rid of the crippled DATS agent, only for the boy to become infected as well. Worried for the sake of Keenan, Falcomon strikes a deal with the other DATS to lead them to the whereabouts of a vaccine that lies in Wanderer's Cape that can counter the effects of the virus. Meanwhile, Gotsumon sends Blossomon to prevent the vaccine from being obtained.