Set in the eastern suburbs of Melbourne, MUTT follows Odette Harker as she comes to terms with her first pregnancy. She had a rough upbringing, and she now looks to her conservative in-laws for guidance on parenting. But when a robbery occurs at the family’s building company, the couple’s dog Barney goes missing as well. Dog fighting is prominent in the area, so Odette secretly goes against the families wishes, to infiltrate the dangerous underground world to save her dog from a torturous death.

Jayden flees his abusive past, unable to deal with the tyrannic grip of his stepfather and his mother's reluctance to leave him. On the open road with no destination or plan, Jayden relies on the kindness of his friends and eventually strangers. Haunted by the demons of his past and struggling to stand on his own two feet, Jayden must confront the failures of his judgement and his overly credulous nature to turn his life around and try to break the cycle of abuse.