Transmigrating into the ninth year of the Wude era with a Shura Armor on his back, Qi Tian just wants to lie flat.
At the Weishui River alliance, he descends from the sky and drives back two hundred thousand Turkic cavalry with a single move. Li Shimin is awestruck, but all Qi Tian asks for is a patch of wasteland on Longshou Plain.
A modern villa appears out of nowhere, stunning the emperor and empress, but Qi Tian only wants a quiet life. Cheng Yaojin and Yuchi Gong drop by every day to trade barbs, while Li Yuan is coaxed into mending his relationship with his son.
Then, in the Taiji Palace, six summoning devices are bestowed alongside their armor. The Emperor Armor goes to Li Shimin, and the five Light and Shadow Armors go to the Five Tiger Generals. A strict rule is laid down before all: “They are to be used only to defend the nation and repel its enemies, never in internal power struggles!”
From then on, the Tang Dynasty has an army of divine armor.
They crush the Turks and capture Jieli Khan, earning Li Shimin the title of Heavenly Qaghan. They pacify the Western Regions and subdue Goguryeo, while the armored generals make their names feared far and wide. Meanwhile, Qi Tian drinks tea and reads on Longshou Plain, occasionally using modern knowledge to improve people’s lives and make up for the regrets of history.
During the succession struggle, he shows Li Shimin how history ends, bringing the emperor to his senses. When the Yellow River bursts its banks, Qi Tian dons his armor for the second time, turning the tide and saving countless lives.
This is the story of a transmigrator who doesn’t want to be emperor or start an industrial revolution, and only wants to lie flat, yet accidentally becomes a legend of the Tang Dynasty.