Hao Yun, through a series of coincidence and unfortunate events, gets caught up in a chase performed by the Bureau of Transformer after a cat enters his clinic. They try to erase his memory, but it doesn't work. They try to figure out what animal he is, but nothing matches. Hao Yun learns that there are monsters in the world as he tries to escape the prison. (Source: jindreame at MyDramaList)