Hoc Vien Canh Sat 4 tiep noi cau chuyen khi chi huy Eric Lassard nhan thay luc luong canh sat duoi quyen dang phai lam viec qua suc va roi vao tinh trang thieu hut nhan su tram trong. De giai quyet van de, ong dua ra sang kien tao bao la thanh lap chuong trinh tuan tra dan su nham keu goi nguoi dan tinh nguyen tham gia truy bat toi pham. Ke hoach day tham vong nay nhanh chong gap phai su can tro tu doi thu truyen kiep la thuyen truong Harris, nguoi dang ngam am muu pha hoai chuong trinh vi dong co ca nhan. Truoc tinh the do, si quan Mahoney cung cac dong doi buoc phai tim cach huan luyen lua dan quan moi vao khuon kho dong thoi giai cuu chi huy Lassard khoi nhung ranh roi. Bo phim hai hinh su cua dien anh Au My do Jim Drake lam dao dien, ra mat nam 1987 voi thoi luong 88 phut. Dan dien vien tham gia phim gom Steve Guttenberg, Sharon Stone, Bubba Smith, Michael Winslow, David Graf va Tim Kazurinsky.