November, 2006. Two Police officers are summoned to a hospital in London to interview a man named Alexander Litvinenko, who claims to have been poisoned.

Watched by the world, the Metropolitan Police follow the radioactive trail of Polonium across London in search of Litvinenko's killers.

A team of detectives, led by Brian Tarpey travel to Moscow to interview Lugovoy and Kovtun, now the prime suspects behind Litvinenko's murder.

When the investigation fails to bring about extradition of Lugovoy and Kovtun, Marina begins an 8 year battle to seek justice for her husband's murder.