Watch on Soap2day. For three months each year, you can walk from the USA to Russia across an ice bridge—a frozen path known as the Ice Curtain. In 1963, when the body of a woman is discovered frozen into this icy no-man’s land, the already fragile geopolitical balance between these two countries threatens to collapse. With nuclear tensions intensifying, a veteran FBI agent and an ambitious new female KGB operative are forced into an uneasy alliance to solve the murder — before the ice melts and a global conflict is triggered.