With their mother needing round the clock care two brothers argue over who is pulling their weight, whilst the third brother takes matters into his own hands.
Three Brothers Grim features stock footage leading into shots filmed separately by each actor, cut to give the illusion of a live conversation.
The cast never met. Directions were given via text. Various cameras were used, including a webcam. Extensive grading in post helped marry the formats together.
Audio was recorded directly on the phone each actor was holding in the shot.