The three brothers who were invited to participate in a police robbery exercise, got drunk and went to the wrong bank. They coincidentally met a real robber and not only cleverly solved the robber, but also uncovered the mastermind behind the scen
The answer is revealed at a mysterious restaurant called "Ghost String" on Guijie Street in Beijing. Gou Shixiong and his brother-in-law Hu Gao met three other parties involved in the previous imperial murder case - the National Teacher Liu Yixian