Jo's world shatters 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.

Events in the hotel reach their explosive climax, and an unwilling Jo is dubbed a hero. But back home in England, she must face her grief and her friends' recriminations if she wants to move forward.

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.