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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?
Aired 08/09/2006EP 1 - Full

Lupin the 3rd: Seven Days Rhapsody
Lupin and Jigen planed to steal enormous money from a racetrack in New York. Their plan is perfect and the only thing remains is to wait for 6 days. To celebrate the success beforehand, they go to a town.
Lupin parts from Jigen because he recalls another engagement. Then, Lupin saves a girl, Michelle, being chased by suspicious men. She asks Lupin to steal a diamond from her father in order to stop him from doing evil things. Lupin thinks he can get both money and a diamond 6 days later, and he accepts her request to guard her for 6 days.
Meanwhile, Jigen meats his old fellow soldier, Ryatte, and they’re talking about another business. Then, Jigen is supposed to spends 6 days with Ryatte before the plan with Lupin. On the other hand, Fujiko and Goemon are planning to steal a diamond at a diamond exhibits. The host of the exhibition is…
(Source: AniDB)