Grace comes home to find a crime scene in her living room. Her sister, Eve, is at the centre, having killed their neighbour's dog. As they try to clean the room, and ascertain what led them to this moment, questions of faith and morality are brought to the forefront. With the atmosphere growing darker all the while, Bad Dog asks us to consider what we might personally sacrifice to protect those closest to us. The play explores sisterhood and love, in a drama-horror genre.