The LEGO® City crooks have kidnapped the Arctic Explorer’s frozen mammoth. They have escaped from their Mountain Police Headquarters jail cell and are headed for the City in the stolen police helicopter. Time for super cop Chase McCain and the downtown City Police to take over the chase! As it turns out, a prehistoric animal in a giant block of ice is not cut out for the busy City streets, and the crooks’ plans soon come crashing down. Before they know it, they find themselves in a really hot mess in a burning building! Can the police and firefighters save the mammoth and catch the crooks?