Neptune's Feast is a satirical comedy that takes place in a small village in Sweden during the cold winter months. The story follows a group of eccentric characters who are dealing with the challenges of living in a freezing environment. The plot centers around their interactions with each other, as well as their humorous and sometimes absurd attempts to navigate the bureaucracy and unique quirks of the village.

The boy writes an essay at school in which he wants to be like his father - with mayonnaise, i.e. "MNS" (junior research fellow).