Lupin III vs. Detective Conan

The Queen of Vespania and her first born son are killed in a hunting accident, leaving behind her daughter, Princess Mira. Conan ends up protecting her after a failed attempt on her life. Coincidentally, the gentleman thief Lupin III happens to be there as well, in order to steal the Vespanian Crown. Later on, both Lupin and Conan realize that the deaths of the two royals may not have been an accident at all and must team up in order to solve the case and keep Mira safe.