Having retired as Batman and moved to Italy with Selina Kyle (Catwoman), Bruce discovers that there is trouble again in Gorham City where a serial killer is on the loose who calls himself Riddler, as he keeps dropping clues off for the police about his next victim. Bruce and Selina must come out of retirement to deal with Riddler. Meanwhile, an old cop friend of Bruce, Officer Basil Karlo, returns to Gotham. He soon gets into a horrific incident that causes him to turn into Clayface.
