Mr. Troy, manager of the Pet Adoption Center, was having a very bad day! Mr. Troy and his dog, Bunsen had arrived at the Center right on time. However, when he opened the door, he was surprised to find that the building was not nearly as crowded as it was when they had left the night before. After an examination, he discovered that all the dogs had disappeared.

All the other animals were still Inside their homes. Who let the dogs out? After some discussion, the police decide to call in some very special assistance from Max and Eva. Max and Eva are twins with very different skills. Max is a brilliant student with an amazing talent for solving mysteries. Eva has the ability to communicate with animals. She is known as 'the Pet Whisperer'. See how they all work together to solve the mystery of who let the dogs out.