A teenage assassin kills with a single kiss until she is ordered to kill the one boy she loves.. Marinda has kissed dozens of boys. They all die afterward. It's a miserable life, but being a visha kanya, a poison maiden, is what she was created to do. Marinda serves the Raja by dispatching his enemies with only her lips as a weapon. Until now, the men she was ordered to kiss have been strangers, enemies of the kingdom. Then she receives orders to kiss Deven, a boy she knows too well to be convinced he needs to die. She begins to question who she's really working for. And that is a thread that, once pulled, will unravel more than she can afford to lose.

A single kiss could kill. A single secret could save the kingdom. Iyla and Marinda have killed many men together: Iyla as the seductress, Marinda as the final, poisonous kiss. Now they understand who the real enemy is—the Snake King—and together they can take him down. Both girls have felt as though they were living a lie in the past, so moving into the King's palace and pretending to serve him isn't as difficult as it sounds. But when you're a spy, even secrets between friends are dangerous. And each girl has something—or someone—to lose. Does every secret, every lie, bring them closer to the truth or . . . to a trap?