Transmigrated into a chaotic world where the weak are prey, Xu Yang survives as a lowly miner, hiding his true earnings to avoid the greed of bandits and corrupt officials. With a father who abandoned him and a younger sister to protect, he walks a razor's edge under the thumb of the ruthless Three Unity Gang. His only hope lies in a mysterious 'Martial Dao Longevity' panel that rewards his efforts with points to enhance his lifespan, comprehension, and physical attributes.

However, time is running out; martial arts schools refuse students over eighteen, and the gang's demands are escalating from extortion to human trafficking. Forced to accelerate his plans, Xu Yang must balance his secret training with the desperate need to gather funds before his window of opportunity closes. As he begins his journey from a humble laborer to a martial artist, he discovers that true strength is the only currency that matters in a world governed by brute force.

Can he master the legendary Diamond Exercise and forge an indestructible body before fate crushes him and his sister?