The Salisbury Poisonings

Tracy, head of Wiltshire Council Public Health, must handle the fallout after two people fall unconscious in a city center due to an unknown illness. She discovers that it's actually a deadly poison that's been spread all over Salisbury.

Salisbury is transformed into a military zone as troops cordon off the city. Tracy grapples with the immense pressure of public safety, while investigation reveals that Sergei, at odds with Russia, was targeted with the lethal nerve agent Novichok. The source is traced to his home, where DS Nick was also exposed, devastating his family. Shrouded in fear and anxiety, the city remains plunged in a chaotic crisis with no clear end in sight.

The Salisbury crisis devastates local tourism while straining Tracy's relationship with her son. As Dawn struggles with addiction and hopes for reconciliation, her father remains skeptical. Though Nick is discharged, he suffers from lasting aftereffects. In June 2018, just as the lockdown lifts, a new Novichok victim is discovered. The nightmare, seemingly over, casts a dark shadow over the city once again.

Four months after the initial poisoning, a new victim sends the UK into fresh turmoil as more areas are cordoned off. Amidst the chaos, a guilt-ridden Stan resolves to mend his relationship with his daughter. Meanwhile, Nick returns to work but struggles with the lasting psychological and physical effects of his trauma. As this unprecedented crisis disrupts daily life, the profound sense of loss forces everyone to reexamine and strengthen their family bonds.