Master Yi stood before the worn wooden door of Grandpa Yin's humble shack. He raised his hand and knocked, the sound echoing in the stillness of the surrounding mountains.
The door creaked open, revealing Grandpa Yin's weathered face. His eyes sparkled with mischief as he greeted his sworn brother. "What's with that look? Have you got your underwear on back to front, you old fool?" he jested, a wry smile playing on his lips.
Master Yi's expression remained unchanged, his gaze fierce and unwavering. He stepped into the dimly lit shack, his presence commanding. Grandpa Yin's playful demeanor faded as he sensed the weight of the situation.
"What's happened, Old Yi?" Grandpa Yin inquired, his voice tinged with concern. "That stern face of yours tells me something's gone awry."
