Adam cannot believe his luck, beginning a relationship with the beautiful Sarah after meeting her at a concert. Wilfred, Sarah’s dog is determined to make Adam’s life as difficult as possible when he moves into the household, attempting to put an end to their relationship and drive him out of the house. After weeks of torment Adam questions his sanity as the ongoing psychological war with Wilfred continues.

Sarah’s relationship with Adam is progressing smoothly. She tells Adam that it is important to her that he and Wilfred get on well, explaining that she and Wilfred are a package deal. To prove to Sarah that he loves Wilfred, Adam decides to spend some quality time with him.

Sarah demands a ceasefire between Wilfred and Adam realising that the tension between the pair is rising. Adam apologises to Wilfred, but he threatens to tear out Adam's throat.

Adam and Sarah plan to spend some quality time at the beach together while Wilfred plays in the shallows.

Adam and Sarah seeks help from TV vet Jack Underwood. He arrives after receiving their letter and sets about to adjust Wilfred's behaviour problems.

Sarah sees an old friend on TV. Adam and Wilfred crack jokes about the true nature of this old friend. Their jokes come back to haunt them when he turns up on their doorstep to visit Sarah.

Adam takes Wilfred to play in the park. Seeing that Wilfred is playing happily, he decides to go for a walk. During Adam's absence, Wilfred is captured by a pair of dog catchers.

Adam is shocked when Sarah decides to break up with him. He begs her to reconsider and to call him if she should change her mind.