As an epidemic of a lethal airborne virus - that kills within days - rapidly grows, the worldwide medical community races to find a cure and control the panic that spreads faster than the virus itself.
Tessa finds herself struggling with her complicated relationship with Hardin; she faces a dilemma that could change their lives forever.
20 years since their first adventure, Lloyd and Harry go on a road trip to find Harry's newly discovered daughter, who was given up for adoption.