A political aide is struck by a rush hour train at a busy London station. But what initially looks like a tragic accident is, in fact, the first in a chain of events that will shock the world to its core. On the morning of his death, Jeff Tindle was on his way to meet journalist Peter Sacks, promising a major scoop involving the Leader of the Opposition. It is only when Tindle fails to show - and Sacks sees the news - that the true gravity of the situation becomes apparent. When Sacks receives a mysterious voice note - becoming the only man alive who knows the whistleblower's secret - it is both the first piece of the puzzle in a shocking international conspiracy, and the beginning of a deadly investigation into the dark, deceptive heart of power. The Whistleblower is the story of a journalist who is thrust into a political conspiracy, and the people in power who will stop at nothing to keep him quiet.