At Radio Czechoslovakia — one of the last bastions of free speech under communist rule — a battle for truth unfolds. Tomáš, a cautious and reserved man, fears that his younger, rebellious brother Pavel will be hired at the station and find himself in danger. But it is Tomáš himself who is unexpectedly chosen to join the team — alongside the bold journalist and freedom fighter Milan Weiner. Together, they strive to broadcast the truth in a world where every word could cost them their lives. Under constant surveillance and growing threats from the secret police, they confront censorship, expose corruption, and become entangled in the defining moments that shaped history.