Honor Guest had a normal life. A family. A house in the suburbs. She sacrificed that normalcy and agreed to serve Leviathan so that her husband and son could live. But now a new danger threatens her former life: Smoke. Honor's half-sister, a failed Leviathan experiment in bio-engineering. Can the ultimate Leviathan assassin stop a deranged and vengeful version of herself from annihilating everything the Silencer holds dear?