S1·E7 A Wolf Calls a Wolf

Three scrolls contain the secret of creating a blade like the Zantetsuken. Lupin wants to steal them as a matter of family pride because his grandfather, Arsene Lupin, stole them back in the 19th century. Lupin's father stole a dagger from a swordsman that was forged using the same process. The swordsman challenged Lupin II to a duel and lost. But, he managed to steal the scrolls for himself. Now, Lupin plans to steal the scrolls back, but to do so, he must face Goemon and Fujiko, who have their own plans for acquiring the scrolls.