The series follows Section 20, a clandestine British secret intelligence branch, as its elite operatives race globally to neutralize catastrophic terrorist threats. Driven by duty, sacrifice, and the relentless pursuit of justice, the unit is initially spearheaded by cunning
intelligence officer Colonel Eleanor Grant. The core dynamic anchors on Michael Stonebridge, a disciplined British sergeant bound by honor and military precision, and Damien Scott, a disgraced former U.S. Delta Force operative motivated by redemption and a second chance after being betrayed by his own government. Together, this mismatched pair forms an unbreakable bond, balancing constant friction with lethal tactical synergy.In the early seasons, Stonebridge and Scott hunt down the sociopathic mastermind Latif, who possesses stolen nuclear triggers known as "Project Dawn." This harrowing pursuit spans the Middle East and Africa, testing the team’s psychological and physical limits. Personal stakes escalate when Stonebridge discovers his wife’s affair with his colleague, injecting deep emotional turmoil into high-stakes combat operations. Following Grant's departure, commanding officers like Major Philip Locke step in, bringing their own haunted pasts and moral gray areas to the division.As the series progresses, the threats expand into global conspiracies orchestrated by the shadowy cabal known as The Crescent, as well as ruthless cartels, cyber-terrorists, and rogue states. Section 20 operates across Colombia, Beirut, Budapest, and beyond, engaging in relentless gunfights, infiltration, and rescue missions. Character motivations constantly evolve; Scott continually seeks validation and struggles with his inner demons, while Stonebridge fights to protect the innocent while grappling with the heavy toll of endless war.By the later seasons, mounting casualties necessitate a generational shift. A fresh iteration of Section 20 is formed, featuring operatives like Samuel Wyatt, Thomas Macallister, and Gracie Novin. This new blood inherits the mantle, driven by the same unwavering resilience. They take on a desperate vendetta against the ruthless Russian terrorist Arkady Ulyanov and his lethal enforcer, Katrina Zarkova. Across shifting alliances, double crosses, and devastating personal losses, the new team must navigate shifting geopolitical landscapes to prevent
biological warfare and mass slaughter. Ultimately, *Strike Back* portrays a brutal, fast-paced world where heroes are forged in fire, camaraderie is essential for survival, and the line between duty and self-destruction is perilously thin.