Sergeant Cooper the Police Car and Dent the Detective Car are on a mission to solve a mysterious case: someone is stealing garbage containers and scrap metal. Because of this, their city is polluted. Sergeant Cooper and Dent find their first clues inside the city tunnels. From there, they are led to the main boss who hides inside the recycling plant! Cooper and Dent must work together and do their best to solve this case and clean up the city!