Shin Tae-yang

Unicorn, though a respectable corporation, is actually a shady organization that collaborates internationally in drug trafficking and assassinations. Its heir apparent, Ki-cheol, and his loyal ally, Cheol-ho, are among its leaders. Meanwhile, detective Min-gyu, the head of the detective unit, single-handedly works to uncover the organization's dark secrets, but is brutally murdered along with his wife by those who have even recruited the Interpol director.

Seo Jae-won who suffered an unfortunate childhood, becomes an ambitious and driven CEO that chases after success. But when her obsession gets out of hand, she tries to escape from her unhealthy desires but her husband, a designer and college professor, gets swept up in the process.