The Fourth Great Ninja War.
When Uchiha Madara used the Rinnegan to cast the Infinite Tsukuyomi and plunge the entire world into sleep, he laughed wildly, certain his dream was about to come true. Then Yuan Li arrived on the battlefield and crushed his false dream of peace with overwhelming force.
Yuan Li did not undo the Infinite Tsukuyomi. Instead, he replaced everyone's dreams with another dream.
From that moment on, everyone in the shinobi world would face a choice.
Live, or die!
And it all began the day Yuan Li became a gate guard at the entrance to Konoha...