Sera Han is the "Frozen Guillotine" of Starfall Media, a ruthless CEO who treats people like assets and emotions like liabilities. But when a corporate hit goes wrong, she accidentally binds herself to Lucian a Prince of the Seventh Circle sent to collect her grandfather’s debt. Now, the Demon Prince is her "Personal Assistant," forced to obey her every command by a glowing brand on her wrist. But the bond is a two-way street. Every time Lucian saves her life, he takes a piece of her soul. As the mysterious Order of the Sun closes in to erase them both, Sera must decide: Is she willing to lose her humanity to save her empire? And what happens when the slave she owns starts to own her heart?