Police officer Honour breaks into Ms Mesmer's house, determined to arrest her (you, POV). She's very cocky and not afraid by the fact that she has been turning other officers into all sorts of pets through her special powers.
However, while talking she doesn't realize that she is stripping naked: when she realizes that, the WPC hat is the only item she still has on. Embarrassed, she tries to cover herself up, growing worried, especially when she realizes she starts to bark and feel urges to catch her tail, go on all fours, stick her tongue out and much more.
By the end of the video, she has been turned completely into Ms Mesmer's pet.