The protagonist, Ye Chen, is reincarnated into the Douluo Continent with memories of his past life as a fantasy novel enthusiast. He awakens with bipolar attributes that represent the ultimate light and darkness, granting him exceptional power. As he strives to become stronger and shape the future, Ye Chen unexpectedly discovers the secret of time. This discovery allows him to become the Ruling Douluo, mastering both light and darkness. However, the novel delves into the internal conflict between these extreme ends, questioning whether light or darkness will ultimately prevail in his heart.