Legend has it that there is a purple butterfly, a symbol of happiness. People say that whoever finds it will forget their sorrows and pain.
Some say happiness is a purple butterfly, hidden in people's blood and flowing through them, life after life...
Will the legendary assassin Ye Sha and an ordinary librarian ever find a moment of love? What will make him give up killing? And what will change when a mysterious visitor arrives? Could this be the purple butterfly he has been searching for?
The love story of a legendary assassin is about to unfold in all its splendor...
