-The heroine Su Qingyuan was originally the daughter of the top aristocratic family "Su Family". The family was wiped out overnight. She was rescued by a loyal servant. She mistakenly believed that the orphan boy "A Jin" she had adopted when she was young was the only survivor. She took him anonymously, raised him carefully, and treated him as a biological brother. However, she did not know that A Jin was the executor of the family extermination case and stayed with her due to amnesia/being manipulated.
The male protagonist A Jin, whose true identity is a killer trained by hostile forces. After his family was wiped out, he lost his memory accidentally. He was rescued by Su Qingyuan and given the name "A Jin". He gradually developed dependence and loyalty in her warmth, but after the memory was restored, he fell into the ultimate pull of "love and sin".
