centers around an imperfect copy of a Grail War based on the Third Holy Grail War in Fuyuki. Following the conclusion of the third Grail War, a US-based organization with magi distinct from the London-based Mage Association, used data from Fuyuki's Grail War to plan their own ritual. Seventy years later, they used the city of Snowfield as the Sacred Land for their own Grail War. However, they were unable to successfully replicate every aspect of the ritual, resulting in it acting only as an imitation that has lost the Saber class and allowed for the summoning of strange Servants due to the blurring of the definition of a "hero." Rohngall and his pupil, Faldeus, have been dispatched by the Mage's Association to investigate the city and the state of the war. Faldeus, a US organization spy, has Rohngall sniped upon his arrival, despite knowing that Rohngall is a puppet. He declares that their Holy Grail War has been in development and is real, causing a commotion at the Clock Tower, and that he wishes to "advertise" the project to the Association.

This story takes place in ancient Liang, where many locals, upon their deaths, have their bodies inhabited by souls from 2,000 years in the future, transforming into time travelers. These time travelers bring advanced experiences and knowledge to Liang, simultaneously raising suspicions and concerns among the reigning emperor. Amidst the changing tides, a time traveler named Lou Zhu, who advocates for peace, forms a deep bond with Zuo Yunqi, a native member of a prominent family, and attempts to find a path to progress and coexistence for all. However, tensions between the imperial court and radical time travelers escalate rapidly. In an explosive incident, Lou Zhu becomes entangled to prevent mutual destruction but tragically gets buried under a collapsing mountain, and his fate remains uncertain. Half a year passes in the blink of an eye. Seizing the opportunity presented by the major explosion, the emperor orders the eradication of all time travelers, while a radical time traveler organization called the "Pioneers," led by Jiao Jiaoran, seeks to use the upheaval to overthrow the imperial authority and gain an advantage in warfare through the use of modern weaponry. Both sides share a common focus—the legendary Lou Zhu, who is said to be recovering from injuries in the martial arts community.

The Pioneer Expedition was a mission to confront alien forces in space to prevent interplanetary war on Earth. It took place concurrently with the 2nd and 3rd Robotech wars. The expedition was led by Lisa Hayes aboard the SDF-3, which was launched in 2022 in search of the Robotech Masters. The mission soon became preoccupied with the liberation of worlds under the control of the Invid Regent. In June 2030, the final battle of the Second Robotech War caused a release of the spores of the Invid flower of life across Earth, which soon attracted the Invid. In 2031, the Invid, under the control of the Regis, invaded Earth. The United Earth Forces (including the elite Army of the Southern Cross) had been severely weakened by the Second Robotech War and were only able to offer limited resistance. In less than a week, the Invid seized control of the planet and began utilizing the human population for slave labour and scientific experiments. In 2038 and 2042, the REF sent the 10th and 21st Mars divisions to try to retake the planet, but both ended in complete failure. It was only with the third attempt in 2044, which involved all available REF forces (now equipped with new technology known as new Reflex Weapons and Shadow Techno Fighters obtained from the Haydonites) that the Invid were dislodged from Earth.

In the wake of scientific advancement, the once majestic mythological animals can't be compared to the olden days now. The mythological animal Sibuxiang received orders to descend to the mortal world and to help out other mythological animals in dire straits wandering the human world. In the secular world, he met his old colleague Pixiu in a tight spot, his drinking buddy Tuye down in his luck, and the gold and silver Jue brothers who were demoted to the mortal world... what kind of stories will happen between them?