After a successful heist at the race track, Lupin has his sights set on a valuable diamond set to be displayed in seven days. His plan is complicated when he saves a young girl named Michelle from a group of thugs. Michelle’s father is very rich and connected to the diamond; her father also enlists an old mercenary friend of Jigen to persuade Jigen to work for him. Goemon has also been hired by Fujiko to assist her in her own plans for the diamond. With no one to turn to and double-crosses galore, can Lupin pull things together in a week?