They say dreams are memories of another life in a different space-time. Even now, Luo Xiaoke believes all of this was just a dream.
A highly intelligent, older engineering graduate from Tsinghua University, Luo Xiaoke is optimistic and kind, with a wealth of talent. But she was born with a large red birthmark on her left cheek that cannot be removed.
So she wears a mask every day. After five years working in Shanghai, she's still just a junior employee at a foreign company, and has never had the courage to fall in love.
Then she meets the mature and kind Xia Yuqing. Luo Xiaoke secretly falls for him, but never dares to show him her true face.
For love, she resolutely decides to have plastic surgery. She makes an appointment with the "quirky doctor" Dr. Ke Li at the Ugly Duckling Plastic Surgery Center, but accidentally activates the Dream Machine he invented. After falling unconscious and waking up, she unexpectedly finds herself in the body of Lin Yumo, the naturally beautiful but uneducated, arrogant, and domineering second daughter of the Lin Group.
Was this a shift between space-times, or a cruel trick of a nightmare? In the same space-time, with two entirely different lives, what unexpected things will Luo Xiaoke discover?
Life is a play, and a play is life. Will the ugly duckling become a swan in a dream, or will this be a journey in search of true love...