Unemployed girl Kayla signs a killer contract offering a $600,000 annual salary, tasked with eliminating villains who escape legal punishment. She meets partner Vincent on missions and repeatedly evades Detective Jacob’s investigation. A rival spy Danny lurks beside her to spy on them. Kayla later discovers she possesses extraordinary combat abilities and uncovers the truth that she was a human test subject, and the boss Morgan planned her recruitment all along. In the end, she kills Danny and unites with Vincent, who defied orders to return, to stand against Morgan.
