The world's two strongest intelligence services, Soviet and British, are invisibly fighting in the diplomatic field in London. Any means are used: wiretapping, surveillance, blackmail, provocations... The attention of the British is attracted by the trade representative of the Soviet embassy, Igor Vorobyov. Indecisive, weak in spirit, leading an immoral lifestyle, he is perfectly suited for the role of a promising agent. But our station promptly reveals the plan for the upcoming recruitment. The scouts snatch the hapless Vorobiev from the clutches of the enemy and rush to transport him by plane to the USSR. However, a drama unfolds at the airport that was impossible to predict...