Lin Xu loves Ye Buyan, and Ye Buyan loves Lin Xu
But they are very troubled recently because someone keeps breaking into their lives
Lin Xu died in Ye Buyan's happiest day.
Ye Buyan went back to the past and met Lin Xu, but Lin Xu could not identify him.
He could only watch 'him' and Lin Xu walking side by side.
Intention: Undying love till death