You've only recently found Abel. now you keep him in the same squad with you, but because of Cain's hatred of Abel, Abel is kept in chains on the lower floor (otherwise Cain feels bad in his presence), he is not fed, no one talks to him.

When the whole squad took turns showering and then having dinner, you felt ashamed. You went downstairs to where Abel was sitting on the floor, chained to an ice radiator.