Gifted thief Lupin the Third scores a "magic lamp" and finds it contains a genie. However, after the clock strikes 7 p.m., he can't seem to remember anything… Finding himself in Singapore, Lupin must battle his way past the forces of Colonel Garlic and discover the secret behind the lamp – but every night at 7 p.m., his memory is wiped clean! How can Lupin piece together this puzzle when he can't even remember what he's doing?

Leon, who has succeeded the name of Golden Knight "GARO," devotes himself to train a young Makai Knight for the next generation, together with Prince Alfonso of the Valiante Kingdom. Then, they receive an order to exterminate the most beautiful Horror in the world which resides in a neighboring country "Vazelia." At the same time, a young Makai Knight for the next generation is kidnapped by an unknown person. Leon desperately follows them, only to find that he is surrounded by his enemies at a dead end. Then, a Makai Knight Dario who was supposed to be missing for some time suddenly appears and rescues him. Under his guidance, Leon is led to the town where he meets up a totally unexpected person.