Chen Mo, a modern office worker, suddenly finds himself reborn as a two‑month‑old lion cub with a crippled hind leg on a vast, unforgiving grassland. The pride that birthed him rejects the weak cub, leaving him to fend for himself. Just as despair sets in, a mysterious self‑discipline system activates, presenting him with daily challenges such as bathing, walking steps, and observing creatures.

Completing each challenge grants titles that heal his body, boost his attributes, and unlock temporary battle states like the [Raging State]. Using his human intellect, Chen Mo adapts lion behavior, refines his hunting technique, and gradually earns the pride’s begrudging tolerance while secretly preparing for independence. Meanwhile, the pride faces internal strife and the looming danger of rival male lions seeking to overthrow the king.

The novel follows Chen Mo’s struggle to survive, grow stronger, and carve out a place in a world where strength is earned through relentless self‑discipline and clever adaptation.