Adenine is blind and isolated in her small attic bedroom. Convinced she is the last carrier of the Death Plague, she avoids contact with the outside world.

When her mother fails to bring her food Adenine begins to starve. Driven by her hunger, Adenine ventures into the house discovering her mother bedridden and sick. Despite her terror of infecting others, Adenine fumbles her way onto the streets of Borrelia in search of the town's doctor.

Soon, she is surrounded by new friends... and enemies she never knew existed. Every secret unravels. Every lie is discovered. Now Adenine's life depends on who she decides to trust.