Luego de perder su hogar ante un poderoso rival, un luchador impulsivo entrena con su despiadado abuelo a la espera del momento justo para vengarse.

It is a cross over between the series Lupin III and Case Closed and takes place after the television special Lupin the 3rd vs Detective Conan, additionally incorporating various elements from its predecessor in its plot. The plot follows Conan Edogawa who sets out to apprehend Arsene Lupin III, the suspect of stealing a jewel called Cherry Sapphire.

Un extraño chico llamado Tsukasa aparece en el videojuego en línea "The World". Afirma estar vivo y sin computadora.