The Inner Line (Russian: Внутренняя Линия) was a secret intelligence and counter-intelligence organization of the Russian All-Military Union (ROVS), leading Russian White emigre organization.
Inner line was seriously discredited after kidnapping of General Evgenii Miller by Soviet agents, followed by disappearance of his aide Nikolai Skoblin, who was an NKVD double agent posing as an Inner Line member.
References
Inner Line Wikipedia(Text) CC BY-SA