Jo's world fractures when gunmen attack the luxurious Spanish hotel where she's holidaying with family and friends. The ensuing horror puts lives at risk and exposes secrets.

With the hotel shooters still at large and crippled by fear for her own family, Jo summons her courage to rescue as many staff and guests as possible.

As events in the hotel near their explosive climax, with many still in danger, Jo fights to save lives, protect her family and stop the shooters.

The tragedy's aftermath sees Jo filled with self-loathing but dubbed a hero; she must deal with her guilt and her friends' recriminations in order to move forward again.