In 2023, Scientist Daniel Rudolph told the WHO Board of Directors that he may have discovered a cure to the Coronavirus. He is tasked with carrying out all necessary lab tests to ensure the 'cure' is safe for world consumption. Emilia Larsson, Regional Infection Prevention Coordinator with the CDC, is assigned to work with Doctor Rudolph on his cure and to ensure that all his procedures are WHO approved. It is a dream for her to work with her new team and when she meets the test subject, Alexander Maxwell or 'subject zero' as everyone calls him, she starts to fall in love with him. As Emilia fights to stop the program which she deems to have been carried out unethically, they make a new discovery. The cure works. But there is a cost.