The truth behind the infamous Tiger Case is finally revealed—Le Fu Fa is the real murderer. But for detectives Jun Sen and Wei Li, the journey is far from over. As they continue to tackle bizarre and dangerous cases, they find themselves drawn into a chilling investigation involving an international assassin terrorizing Hong Kong. With the help of cutting-edge supercomputers, they manage to crack the case—only to uncover a deeper, darker secret.

Before his arrest, the elusive Zi Le had sent encrypted messages and large sums of cryptocurrency to the dark web, hinting at a much bigger conspiracy. Soon after, a mysterious figure emerges, planning mass destruction across the city—and this figure bears an eerie connection to Zi Le. As Jun Sen and Wei Li race to decode the hidden messages and stop the chaos, shocking twists await at every turn.