Sienna Flores was born into a world of drugs and crimes. With both of her brothers going missing, and a father who is desperate to retire from his business, she has had to look after her family's legacy, her empire, since the day she turned twenty-one. Four years later, she has made a name for herself; a name that her allies have grown to respect and her enemies have grown to fear: Reina de la Muerte.

All is running just as Sienna predicted: her business is booming with constant shipments to allies across the world and she is making more money than her father has ever seen in his twenty-five years running it. Nothing can stop her reign to the top-to the throne she has worked so hard for... Until she receives a message from her rivals about a contract agreement signed several years ago. Sienna's perfect world is thrown out the window when she is told that she is to marry the same man that tried to kill her.

Cristian Diaz has grown from the ashes since taking over for his retired father, becoming a silent killer who let's his actions speak for him. Anyone who has heard of his name fears it for rumors both true and false, and his empire is notorious for "getting rid" of others who stand a threat to him without even a trail that can lead it back to him.

When he is informed of a contract that is nearing its date, Cristian sees it as an opportunity. Afterall, if there's one person that he would love to be allianced with in his line of business, it's none other than Sienna Flores, the woman who built an army that could be squashed as easily as ants. But when he meets her face-to-face, all it takes is a single encounter for him to realize that this contract is so much more than a business deal. Maybe there is still something that he can fight for through the dark world the two of them live in. Something he can protect.

And Cristian is sure that Sienna is just that.