Alexander Eberlin, a Russian, became a senior spy after a period of hell-style training and was sent undercover to the British Intelligence Service to carry out various espionage missions in secret. Time passed for a total of 18 years in the British Intelligence Service. The long-term espionage mission exhausted him, so he wanted to return to the embrace of his motherland, but was rejected by his superiors. At this time, he was sent all over Britain to secretly carry out assassination plans. At this time, there was a new change in Alexander Eberlin's life, and his personal safety was at stake.