After a devastating upheaval in her family, small-town girl Xu Chi enters the consulting industry, determined to live by one principle: never let herself be replaced. There, she crosses paths with elite partner Ye Xinzhi, who was once framed and has been plotting his revenge ever since. Starting as a mentor and mentee, the two gradually move from mutual attraction and testing to well-matched allies. Ultimately, they discover that they are irreplaceable to each other.