It is a cross over between the series Lupin III and Detective Conan and takes place after the television special Lupin the 3rd vs Detective Conan. The plot follows Conan Edogawa who sets out to apprehend Arsène Lupin III, the suspect of stealing a jewel called Cherry Sapphire.
(Souce: Wikipedia)
Characters & Voice Actors

Edogawa, Conan
Main
Takayama, Minami
Japanese
Haibara, Ai
Main
Hayashibara, Megumi
Japanese
Jigen, Daisuke
Main
Kobayashi, Kiyoshi
Japanese
Lupin III, Arsene
Main
Kurita, Kanichi
Japanese
Mouri, Ran
Main
Yamazaki, Wakana
Japanese
Agasa, Hiroshi
Supporting
Ogata, Kenichi
JapanesePromotion Videos
Recommended for you
One Piece: Soccer King of Dreams
Movie
5m
Pumpkin Scissors
TV
23m
Queen Millennia
TV
24m
.hack//Quantum
OVA
26m
Blood Lad OVA
OVA
27m
Digimon Fusion
TV
25m
Tenchi Muyou! GXP
TV
24m
Daimos
TV
24m
Ultramaniac - Magical Girl
TV
24m
Xia Gan Yi Dan Shen Jianxin
ONA
17m
Buddy Complex
TV
24m
Dragon Ball: Episode of Bardock
Special
19m
Galaxy Angel 3 Specials
Special
13m
Gear Fighter Dendoh
TV
23m