The Fortress

When a contagious salmon disease breaks out in Norway, Esther Vinter must look after the food supply in the country; Uma, Charlie and their daughter Hope are on the run for a chance at a better life in Norway.

Charlie manages to enter Norway as a migrant worker with Hope; Ariel is questioned by Zara.

Esther is busy identifying the source of the disease when the bacteria appear in an unlikely place; Charlie runs the risk of being deported; Ariel is assigned her first big job: to write a speech preventing panic from spreading in Bergen.

Esther approaches a politician for help; Leo pleads with Esther to leave Bergen.

Esther is pressured to develop a vaccine against the resiliently mutating bacterium; PM Heyerdahl employs stringent measures to prevent the disease from spreading; Charlie gets progressively sick; Ariel's brother wants her to join him.

Esther works on developing a vaccine; Charlie is saved at the last minute.