The Secret Promise summary: The Secret Promise mangaLee Jisoo has one goal in life: to destroy Chairman Jung the same way he destroyed her family. While trying to get dirt on Jung's private life, she runs into Moon Hyun-soo, the CEO of an investment company. Much to Jisoo's surprise. Hyun-soo offers to help with her scheme. Without knowing Hyun-soo's hidden agenda, Jisoo decides to trust him and form a secret partnership. Will this promise born from revenge turn into something more?