AXE and its Soviet counterpart (known here as SIN) believe the assassinations are linked to communist Chinese efforts to destabilize relations between the USSR and USA.
They learn that a Chinese crime syndicate called CLAW, operating from the safety of the Forbidden City in Peking, is behind the destabilization plot.
Carter and Comrade (disguised as guardsmen of the Forbidden City named Lo Mei Teng and Hong Tu Lee, respectively) leave Japan by boat and arrive in China near Shanghai.
Yasunara sees through the disguise and Carter and Comrade are drugged, captured and imprisoned by the Mandarin in an underground labyrinth beneath the Forbidden City.
Using a small concealed knife (Hugo Junior), Carter and Comrade escape, killing the Mandarin and feeding his body to the turtles.