Su Muyan gains the ability to only speak the truth thanks to a protective red string. After joining Huasheng Group, she exposes workplace unspoken rules and commercial scams with this power. She is noticed and promoted by President Fu Jingshen to be his personal secretary. She helps Fu Jingshen fend off scheming young ladies, resolve internal family conflicts and handle business competition. Even after the red string breaks, she stays true to herself. In the end, she joins hands with Fu Jingshen to uncover the mastermind behind all schemes and gains both a successful career and lasting love.