Meet the Korea's least likely contract killer: a 65-year-old woman nicknamed Hornclaw. She may look meek and harmless on the subway, but in reality she is swift and deadly. She knows she will retire soon but is not sure when.

A young man working for the same agency called 'Bullfight' has a grudge against her, the origins of which we discover will reach far back into their personal histories.

For fans of Parasite, Killing Eve or My Sister the Serial Killer, this book mixes a brilliant yet unlikely hero with the page-turning plot of a thriller. It is an unputdownable novel, that carries a poignancy about old age and loneliness.