What to do if a dog disappears without a trace? For the owners, this is like a nightmare: Did he have an accident? Is he still alive? Or did something scare him so much that he just ran away? If all searches and efforts are in vain, the “dog detectives” are called in. Using search dogs and the latest technology, a special team led by Alexandra Grunow is trying to track down missing four-legged friends and reunite them with their owners.