PARK CITY, UTAH Jan. 27 (UPI) -- Frank & Louis, which premiered Sunday at the Sundance Film Festival, is a moving drama about prison and Alzheimer's. Those tough subjects combine for a powerful story about trying to make meaning when health and systems are against you.

Frank Baker (Kingsley Ben-Adir) joins the Rec Worker Program in prison to care for inmates with Alzheimer's. He is assigned Louis Nelson (Rob Morgan).

Impossible situations make great drama. Characters are forced to choose the least bad option and they're only doing their best.

Alzheimer's is a matter of good days and bad in the best circumstances. In prison, Louis sometimes has to be reminded where he is and what he did to get there.

Prison is already full of aggression and distrust. Add Alzheimer's to that and the powderkeg ignites.