Pei Xu mistakenly enters the "Casino of Destiny" where heartbeats are used as chips, and the fate of life and death is determined by the turning of the roulette wheel. He glimpsed the cracks in the rules, united with down-and-out nobles and frustrated musicians, and used probability as a spear and data as a shield to build a "hedge alliance." In the symphony of heartbeats and arithmetic, they use reason to measure the distance between life and death, and finally make the cold roulette listen to the voice of justice.
