The story follows Han Li, a completely unremarkable, impoverished village boy with ordinary looks and the lowest grade 'pseudo-spirit root' (Four-Element Spiritual Root). Driven by a simple wish to send silver coins home to his family, Han Li joins the mortal Seven Mysteries Sect, where he is taken in as a medical apprentice by Doctor Mo. During his apprentice days, Han Li stumbles upon a small, plain green bottle in the dirt—an artifact capable of condensing heavenly green liquid that accelerates the growth of rare spiritual herbs by centuries overnight.

When Doctor Mo attempts to sacrifice Han Li in a soul-possession ritual, Han Li uses cold wit and poisons to survive, taking his first steps into the true cultivation world. Armed with his unassuming green bottle, absolute discretion, and a firm rule never to play the hero, Han Li navigates the cutthroat Huangfeng Valley, the bloody Wilderness Demon Beast Wars, and the lawless Heavenly South Continent, patiently advancing step by step from a mortal nobody into the legendary Old Devil Han.

The authentic martial progression stages recognized in this donghua universe:

1. Step 1: Qi Refinement (Layers 1 to 13)
2. Step 2: Foundation Establishment (Early, Mid, Late)
3. Step 3: Core Formation (Gold Core Stage - Centurial Lifespan)
4. Step 4: Nascent Soul (Yuanying - Millennial Lifespan & Soul Severing)
5. Step 5: Deity Transformation (Huashen - Transcending Mortal Realms)
6. Step 6: Spatial Tempering & Body Integration (Spirit Realm)
7. Step 7: Grand Vehicle (Mahayana - Pinnacle of Spirit Realm)
8. Step 8: True Immortal & Golden Immortal (Immortal World)

Apprenticeship, discovery of the small green bottle, and the life-or-death battle of wits with Doctor Mo.

Entrance into the true cultivation world and building a quiet herb garden.

The brutal survival test inside the ancient forbidden zone, earning Foundation Establishment pills.

The invasion of the Six Demonic Sects, betrayal by the seven allied sects, and Han Li's desperate flight.

Fleeing to the infinite ocean archipelago, hunting sea beasts, and forging the Bamboo Cloud Sword Swarm.