From participants in a local conflict in the Maaluma mountains, captain Sergei Tarkhanov and military doctor Vadim Lyakhov turn into key figures in a big game in which influential circles in Russia and the “Black International” are involved, uniting all those dissatisfied with the current world order. They have to change not only their names and biographies, but also... the time in which they live. However, Tarkhanov and Lyakhov do not yet suspect this, nor the fact that, simply by fulfilling their duty, they prevented a catastrophe that could have killed millions of people.