Lu Yuan took over Laisen’s Clinic, discovered the spreading Strange Dream, and joined the Night Watchers as an Occultist consultant. After contaminated water brought him into the Waterworks investigation, he led a team into the sewer to track the source of the growing danger.
Lu Yuan survived the sewer disaster, treated Lausen and Mina, and was drawn into Night Watcher operations against Deep Sea cultists and the Ascension Society. After bringing Mo Shui to help Mina, he faced Priest Andrew’s attempt to seize her and used his Pocket Watch to cripple the Deacons.
Lu Yuan’s Strange Dream infection led the Night Watchers and their allies to investigate the Iron Whale and the island tied to the Deep Sea Church. The expedition reached a vast mine filled with Deep Blue and pulsing Ore, with the danger still ahead.
Lu Yuan and his allies uncovered the Deep Sea Church’s attack on Grim Port, defeated its high priest, and treated the contaminated defenders. Old Morgan reached City Hall and discovered a ritual vault beneath it as a Rift’s tentacles overwhelmed the Inner City.
Lu Yuan survived Grim Port’s destruction and woke near Sandworm Town, where he recovered while investigating a polluted sandworm and treating an infected townsman. The town’s danger was still unfolding as Lu Yuan warned that others might also be contaminated.
Lu Yuan uncovered Grego’s parasitic experiments in Sandworm Town, then traveled to Bronze City and became entangled in the disappearances and contamination at the Tower of Erudition. He escaped the compromised Tower with Laurina and reached Night Watcher Headquarters, where they were assigned to the Alchemy Workshop.
Lu Yuan protected Laurina from the Tower of Erudition, then investigated disappearances tied to Andre Morris, a living Eerie, and the Sea of Knowledge. The investigation uncovered a strange shell badge and coordinates hidden in Grego’s copper badge, while Lu Yuan remained troubled by changes in his reflection.
Lu Yuan led Ninth Squad through Bronze City’s Ghoul outbreak, survived the defense of the North Spinning District, and explored the broken Conduction Network beneath the city. He returned with evidence of a vast underground Hive and withheld what he had learned about the Copper Pillar’s direction.
Lu Yuan traced a fungal outbreak through the Pipe Network, destroyed its conscious core, and recovered a mysterious crystal. He then joined Agnes’s mission into the Tower of Erudition, where he witnessed Laurina enter the Sea of Knowledge and learned that an entity had noticed him.
Lu Yuan contracted Worms of Knowledge, joined the investigation of Bronze City’s Copper Pillars, and helped expose the Grey Covenant’s attempts to obtain a Seed. After choosing Eerie Inscription Studies, he learned that the Copper Plate might control the seal beneath City Hall and was assigned to investigate a route in the Pipe Network Layer.
Lu Yuan and the Night Watchers uncovered the Tower of Erudition’s dangerous plans while factions sought the Seed and the Grey Covenant’s Tree spread its influence. The arc ended with the students entering the Sea of Knowledge, where Lu Yuan guided them as Sister Lin died clearing a path.
After the Tower of Erudition ritual, Lu Yuan investigated an Ascension Society attack and traced the escaping Tree Man to a hidden Grey Covenant nest. He and his allies fought Nine and Q underground, then escaped as Lu Yuan lost consciousness.
Lu Yuan recruited Dunn and Jurgen, uncovered contamination among Bronze City’s nobles, and helped Klaus fight a Grey Covenant assault. As the Pipe Network’s seal began to loosen, Leike was drawn into a vision where the Person on the Wall showed him an Empire outpost overwhelmed by an Insect Tide.
Lu Yuan and the Night Watchers joined their allies to defeat the Grey Covenant, then uncovered the history of Bronze Sin and pursued a sprouted Seed in the Tower of Erudition. Lu Yuan awakened the Person on the Wall and was swept into the Gray Mist with the Great Ascendant.
Lu Yuan removed the Seed from the Skull, then joined a descent into the Abyss and discovered Forest Seed-infected Ghouls consuming the Bronze Pillars. As the seal network weakened and the Fourth Fishing threatened the Tower of Erudition, the Guardian stopped Kame and K, but the tower’s harvest left the Old Dean dead and the Guardian near complete Eerie-fication.
Lu Yuan stabilized the Guardian before the Person on the Wall used Kame’s black stone to bind them and unleash a crisis beneath Bronze City. As the city prepared to face the rising Eerie threat, Lu Yuan escorted East District residents to Oak Forest City, where he could not reach anyone back home.
Lu Yuan returned to Bronze City as its defenders fought a growing Ghoul threat and joined Klaus’s descent to pursue the Special Individuals and investigate the seal. After the creatures escaped and new Collapse Pits opened across the city, Klaus led the team deeper to learn what lay below.
Lu Yuan found the fourth Fragment beneath Bronze City as the sealed Flesh began to awaken and spread through the city. With evacuation barred and the walls falling, Klaus and the Guardian fought to contain the crisis while the Person on the Wall and the Seed of Hope shaped the city’s last defense.
As the Flesh overwhelmed Bronze City, Lu Yuan took control of the Sea of Knowledge and fought the Crown of Ten Thousand Kings while the Guardian sacrificed himself and Leike advanced to the Fifth Order. Lu Yuan reached the hidden depths of the Hall of Knowledge and met four ancient Forbidden Scholars seeking a way out.
Lu Yuan and his allies fought the Newborn Taboo as he opened the Sea of Knowledge into reality, then forced the rift shut and survived the collapse of the battle. He brought the injured Leike to Hope for treatment, while Bronze City stabilized and Lu Yuan gained Nonexistent Fate.