While everyone wonders where Kim has gone to and why he’s disappeared, in Simla he is trained to become a secret agent by Lurdon. (See film). And the end of the training course, X21 arrives in disguise but Kim recognizes him. The foreign spies have followed X21 and Lurdon, fearing that he might be intercepted, decides to entrust his mission to Kim. Kim is sent off to Calcutta with a message to be delivered to Red Beard. During the train trip, Kim realizes that he’s being followed by secret agents and thanks to a disguise he manages to get off the train unnoticed. Kim takes up his journey on foot towards Calcutta. A chance and entertaining encounter with the crow and therefore with the Lama who is in a bit of trouble. Kim solves the Lama’s problems and they travel the last stretch of the trip together.