KAT invites CHING to the night market. He sends CHING flowers to declare his love and CHING is deeply touched. FUNG’s younger fellows visit her and FUNG performs kung-fu during the banquet. KANG joins FUNG and he is defeated by FUNG’s “Five Tiger Knife Routine”. A guard who visited FUNG before is killed. This guard is killed by the “Five Tiger Knife Routine”. Only 2 persons in the world have learnt “Five Tiger Knife Routine”. One is FUNG and the other is her senior fellow TUEN TIN FU who is being trapped inside a jail far away. KANG therefore suspects that FUNG is the murderer. Two more guards are killed by “Five Tiger Knife Routine” later and KANG arrests FUNG. FUNG asks KAT to search for FU’s apprentice MA SAN but KAT discovers that SAN is insane. FUNG remains to be the only suspect… KAT sneaks into FU’s jail to investigate the case. CHING arrives and helps KAT to sneak into FU’s special jail…