A woman and man from the same flight show up in the hospital. The man dies and Lim and Shaun try to establish whether the two came into contact.
When they find out they were not in the same area, Shaun realizes that the virus is airborne and that the hospital has to be closed off.
Tyler, the EMT got the virus after the lady died. He tried to get Morgan to go on a date with him, and once she agreed, he died.
Lim then got the virus, and the hospital learned that it originated in Malaysia, but there was no cure for it.
Lim collapsed as Shaun gave a patient too much insulin and he fell apart, while Morgan's patient was bleeding out on the table.
Elsewhere, Glassman learned that his cancer returned and he broke down next to Lea.
Claire and Neil worked on a patient who was dying and his father was donating bone marrow. However, one thing led to another and the dad was trapped in the danger zone.
Despite the patient signing a DNR, Neil decided to bring him back to life.