Family comedy starring Olivia Coleman, John Sessions and the voice of David Walliams. Pudsey (Walliams) is a stray dog living, quite happily, alone on the streets of London. While wandering the streets one day he meets Molly (Izzy Meikle-Small), George (Spike White) and Tommy (Malachy Knights), three siblings with a lot of love to give. Having recently lost their father, the three children are set to move to a new house in the countryside with their mum Gail (Jessica Hynes). Unbeknownst to the family, Pudsey decides to tag along and become the newest member of their household. When Pudsey discovers something untoward about the family's landlord Mr Thorne (Sessions), the little dog sets about trying to put everything right.