Intelligence Officer Jackson Lamb leads a team of British intelligence agents who work hard to protect the country's security, but their repeated mistakes lead them into many problems.
In the second season, Jackson Lamb and his team return to face many new challenges and threats, along with the emergence of new spies.
In the third season, Jackson Lamb and his team at the Armed Forces National Security Office go on a new mission, where they have to track down a group of traitors who formerly worked for the armed forces.
In season 4, Jackson Lamb returns to lead the team again against a dangerous enemy and faces many challenges that threaten his career and reputation.