Answer:
Tension was there from the start of the narrative "Condensed Milk." At first, the narrator was weak from hunger, was mistreated, overworked, and envious of others who had easier jobs. He was so feeble that he didn't have much chance of making arrangements for the next day since he didn't know if he'd even live that long.
In the middle, Shestakov approached him with an escape plan, but the narrator discovered he lied about the distance, and he considered all possibilities, knowing there was no chance he could live. Later, he informed Shestakov that he would do it because he needed food for strength. The finale is that he drank all of the condensed milk and became full before deciding not to go. Later, those who sided with Shestakov were either murdered or sentenced to extra time in prison. Shestakov was never punished in the same way as the others, but the narrator survived to work another day.