Do you still remember the person you liked when you were 17? Xu You, a southern girl with excellent grades, transferred to Linshi, accidentally became a deskmate with Xie Ci, a "school bully", and the two gradually entered each other's hearts in the midst of laughter and bickering, but faced with the trick of fate. Years later, the two return to the place where the story began, only to realize that the joy of youth is like apple-flavored lollipops, around and around or the first sweetest ......

In the peaceful town of Whitehorse, strange things are happening recently. In the meantime, a group of strange and evil people have assembled in the barren forest on the outskirts of the town, and they vow to wash the town in blood. The town is shrouded in death gas and oxygen. Everything seems to be pointing at the mysterious woman from outside protecting the hero's descendants, Li San thin and Yue An Yu. Can the heroes turn the tide of the war with the help of Bian Buwen and Li San thin? Will the "Swallow" show up? The answer lies in the hands of Big Brother Innocent.

Mortal Tie Jian is an orphan with no sword soul in his body. Since childhood, he was adopted by sword refiner Chen Guang and grew up with each other. Tie Jian will acquire the supernatural power of a thousand-year sword master by chance.