Spring of 1944. The war is nearing its end. Thousands of concentration camp inmates were brought to the Normandy coast to repair the defenses damaged by Allied aircraft. On one of the islands, a small group of prisoners, led by Colonel Zakharov, prepares an uprising. The course of events was accelerated by an action taken by French prisoners of war. They barricaded themselves in the bunker and were ready, sacrificing themselves, to undermine the fortress.

After Tulyev's arrest, Soviet counterintelligence continues the radio game with the enemy, sending encryptions signed "Nadezhda" to the Western intelligence center. KGB officer Sinitsyn, friendly towards Tulyev, tries to persuade him to take his side — he arranges a meeting to a scout with Mariya and her son, whom he has never seen before. In addition, Mikhail learns that his father didn't die of his own death, but was most likely killed. Meanwhile, a young Soviet scientist Borkov, who spoke at an international conference about his innovative work, finds himself in the spotlight of the Western security services.