Where to Repair a Three-Legged Cat

In order to save his sister, a young man seeks immortality and medicine. He unexpectedly becomes a mortal and enters the immortal sect. However, he is jealous of his special talent and is chased by a rival sect. He breaks into a secret realm and meets a close friend. The two go from arguing to protecting each other. After escaping from the secret realm, they fall into a deeper whirlpool. The road is full of dangers. Let's see how he uncovers the ultimate secret of the world and finds a way out in this fairyland that is full of disputes.