In the action-packed conclusion to The Big Empty, new revelations about the virus that began it all - Strain 7 - come from a shocking source, as the countdown to a final confrontation begins.

The teens are in a race against the clock to stop a new plague from being unleashed by the leader of Novo Mundum. Dr. Slattery's own daughter will be forced to make an unimaginable choice to save her friends . . . and maybe even the world. But will her devastating sacrifice come too late?