Ling Chen, a fan of Kamen Rider in the real world, accidentally traveled to a fusion world where many knights coexisted. Unfortunately, he was captured by the mysterious organization "The Nest of the Abyss" and became the subject of a weird transformation experiment - spider-type weird cells were forcibly implanted in his body. On the verge of complete alienation, he escaped by chance, but was rescued by Kamen Rider Kuuga (Yusuke Godai) on the verge of losing control and going on a rampage. Since then, he has embarked on a path of redemption by "controlling the power of alienation and practicing the true way of chivalry."
He traveled through many knight eras such as Ryuki, 555, Ken, Hibiki, etc., Met and got to know many knights such as Kido Shinji, Mikio, Kenzaki Kazuma, etc., And formed a deep bond while fighting side by side, and finally awakened the "Knight Core" in his body, created his own exclusive driver, and became Kamen Rider Eclipse.
Faced with the extreme conspiracy of "The Nest of the Abyss" to collect the power of knights and try to achieve the so-called "absolute peace" through forced assimilation, Ling Chen always adheres to the belief that "power has no good or evil, and guardianship is justice", and looks for a way to break the situation in the fierce symbiosis between the monster cells and the power of the knights.
Finally, at the apex of the intersection of time and space, he gathered the faith and power of the knights, completely ended the villain's plan, and became the bridge and guardian between reality and the world of knights. He proved with his own existence that chivalry never depends on status, but comes from the original intention to stand up for others.
