From the creator:
“The story is about a group of former Nazi concentration camp prisoners who are dedicated to persecuting and bringing to justice those responsible, many of whom take refuge in Franco’s Spain.
“The time where the plot takes place is the Spain of the 60s. Our aesthetic references were the poster artists of the civil war, such as Jose Renau, in terms of themes, but we tried to separate aesthetics a bit because the story takes place 30 years later.
“We use red to symbolize the expansion of the Nazis in Spain and darkness and blue to oppose the group that fights against them from the shadows.