Kesta has spent her life looking down the barrel of a microscope rather than cultivating personal relationships. But that changed when Kesta met Tim --- her cheerleader, her best friend, her absolute everything. So, when he was one of the last people in London to be infected with a perplexing virus that left the city ravaged, Kesta went into triage mode. Though the government has rounded up and disposed of all the infected, Kesta is able to keep her husband hidden with resources from the hospital where she works. She spends her days reviewing biopsy slides and her evenings caring for him, but he’s clearly declining. As Kesta races against the clock, her colleagues start noticing changes in her behavior. Her care for Tim has spiraled into absolute obsession. But can she save her husband before he is discovered? Or worse...will they trigger another outbreak?