V tretjem nadaljevanju Policijske akademije primanjkuje denarja za šolanje bodočih policistov. Policisti iz akademije pod vodstvom komandanta Lassarda se tako v boj za obstanek podajo s člani akademije komandanta Mauserja. Kdo bo na koncu zmagal? Borba bo neusmiljena, a nepopisno smešna. Lassard na pomoč pokliče svoje bivše učence, da bi poskrbeli za nove kadete, od katerih je odvisna prihodnost njihove akademije. Mahoney, Tackleberry, Hightower in ostali imajo z novinci seveda polne roke dela. Mauser medtem ubere drugačno taktiko.
When police funding is cut, the Governor announces he must close one of the academies. To make it fair, the two police academies must compete against each other to stay in operation. Mauser persuades two officers in Lassard's academy to better his odds, but things don't quite turn out as expected...