The Mousetrap.

Anton is alone in a bunker on the front line when the entrance is hit and the bunker collapses. The soldier is trapped. All the initial optimistic efforts to escape the situation are hopeless. Attempts to establish radio communication with the outside world do not succeed. Fortunately, there is water, food, batteries, but it is becoming increasingly clear that... Then a companion comes from somewhere, a rat. Is this little creature the last living soul to witness the end of Anton?