A special representative of the Soviet government, Ivan Nikolaev, comes to Madrid for talks with the American delegation. However, the dark forces of the USA and the USSR, trying to disrupt the planned disarmament, make an attempt on it. Nikolaev with serious injuries was taken to the hospital. At the same time in the same clinic is a simple plumber Juan Martinez, who suffered from too zealous client. With a broken arm, he is going to be discharged home, but at this moment he catches the eye of
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