After Zhang Yuyan rebuilt the "Space-Time Guardian Protocol," the brief calm was shattered. Remnants of the Wang family digitized their consciousness and infiltrated the timeline to alter history. A mysterious organization called "Time Ruins" emerged, wielding forbidden arts that could manipulate memories and bloodlines as it sought to refine space-time and achieve immortality. Zhang Yuyan and her five dads reunited and embarked on a journey to repair the timeline.
As she protected space-time, Zhang Yuyan's Qilin bloodline began to clash with the Protocol. Each time she used her powers, she witnessed tragedies in parallel worlds. Meanwhile, her dads faced a difficult choice between protecting her and maintaining the order of space-time. As their investigation deepened, the Zhang family's civil war a thousand years ago, the rise of the Wang family, and the mystery of Zhang Yuyan's transmigration all proved closely connected to the Time Ruins.
The final battle unfolded at the heart of the Time Ruins. Zhang Yuyan wove everyone's love and faith into a new protective network and purified the laws of space-time, but in doing so, she lost some of her memories. A century later, remnants of the Time Ruins were reborn through the power of "regret," manipulating causality and making it flow backward. The five dads and one daughter faced them once more. This time, they discovered that the countless warm moments her dads had given Zhang Yuyan were the key to overcoming the crisis. After enduring trial upon trial, they infused their faith into the laws of space-time and utterly defeated the Time Ruins. Zhang Yuyan became an eternal light of protection, carrying on the legend of the guardians of space-time.