What is the main conflict in The Man with the Golden Gun by Ian Fleming?

Secret agent James Bond, believed by his superiors to have been killed while on assignment, returns to London. As those superiors question Bond's identity and the motivations behind his return, narration indicates that Bond's thought processes have been altered by enemy Russian agents for purposes that are at first unknown but soon become clear when Bond attempts to assassinate the head of the British Secret Service. The attempt is foiled and Bond is rehabilitated, sent almost immediately on another mission that should, in the mind of his boss, prove his loyalty once and for all.