Qin Yan, a pure yang body that combusts when walking and breathes fire when angry, is known as the "walking city incinerator" and is only one sneeze away from exploding to death.

Ling Shuang, a pure yin body whose handshake can cause frostbite and breath can freeze, is called a "moving ice corpse cave" and is only a breeze away from turning into black ice.

They were originally two polar opposites who could not tolerate each other, but they became enemies after a furnace explosion in a clinic - and were forced to become "ill-fated partners" because of a huge compensation.

In order to survive, they had to practice the book "The True Explanation of Yin and Yang Harmony" which was despised by the righteous path.

Who would have thought that the opening section of the exercise is "Embracing Each Other to Transfer Qi", the middle section contains "Posture Diagrams", and the last section is labeled "Bath Together in the Spiritual Spring"...

As they practiced, furnace explosions became a daily routine, and freezing into ice sculptures and roasting into charcoal took turns happening. Even the notes of the seniors were filled with "hilarious" training experiences.

"Qin Yan! If you use your Yang energy to burn my hair again, I will freeze you in the ice cellar and use you as a popsicle!"

"Ling Shuang! If you use your Yin Qi to freeze my Dantian again, I'll throw you into the volcano and use you as a popsicle!"

From sabotaging each other to embracing each other in despair, from unlocking postures to communicating with each other's minds, this pair of "ice and fire enemies", amidst laughter and ambiguity, managed to turn the "unorthodox martial arts" that everyone hated into a chaotic way that stirred up the world.

When the villains tried to separate the origin of Yin and Yang, and when the world was on the verge of collapse, they finally understood:

The most extreme physical collision can create the most frivolous love, but it can also forge the most serious legend.

Many years later, a clinic put up a sign: "Specializing in treating imbalances of yin and yang, and improper qigong techniques. The owners and their spouses demonstrate their methods in person, and the results are remarkable (side effect: you might die of laughter)."