The novel features Catherine Ling, a top CIA operative with a tough exterior shaped by her difficult upbringing on the streets of Hong Kong. Just as Catherine is settling into life with her long-lost son, Luke, who was kidnapped nine years earlier, she discovers that someone from her past is targeting her loved ones. The attacker begins by murdering Olena Petrov, a former prostitute who helped Catherine in her youth, and moves on to her close CIA colleague and an informant crucial to freeing Luke.
As Catherine races to protect those she cares about, she must confront her past and the numerous enemies she has made along the way. The story is filled with suspense and emotional depth as Catherine uncovers the truth and seeks to bring the killer to justice.
The novel explores themes of revenge, resilience, and the lengths one will go to protect their loved ones.