This movie tells the interesting adventure story of three ancient Egyptian mummies who live in an underground secret city hidden in ancient Egypt. The trio includes a princess, a former carriage driver, his younger brother, and their pet crocodile baby. Through a series of unfortunate events, these mummies finally arrived in today's London, embarking on a strange and comical journey to find an old ring belonging to the royal family, which was stolen by the ambitious archaeologist Lord Carnaby.