The Interdimensional Crime Group Gangler is using the pieces of the elusive Lupin Collection to attack Earth, but Kairi Yano, Touma Yoimachi and Umika Hayami are three mysterious thieves who stand up against them as the Lupinrangers, with the objective of stealing the collection back from their hands.
The Lupinrangers encounter the police officers Keiichiro Asaka, Sakuya Hikawa and Tsukasa Myoujin who have the ability to transform into the Patrangers. For the possession of the Lupin Collection, a three-way battle between the thieves, the cops and Gangler begins.
The Patrangers make a stop at Bistrot Jurer, unaware that it is the Lupinrangers' hideout. Touma then decides to take the opportunity and attempt to steal their VS Changers, but Kairi has another idea.
The Patrangers investigate mysterious disappearances occurring in closed rooms and a stuffed animal is the only clue they have.
The Lupinranger track a Ganglar, but hold back when he meets with Destra; Hilltop is ambushed while transporting new items of the Lupin Collection; Kairi and Keiichirou each end up with an item, which results in a duel to see who gets both.
Keiichiro is upset about his defeat to Lupin Red and is eager for a rematch, but his companions step in to remind him where his heart should be.
Sakuya asks Umika out on a date, but she throws his number in the garbage. After a Ganglar swallows Kairi and Tooma, Umika invites Sakuya to the next restaurant that is likely to be attacked.
Tsukasa thinks she has caught on to the identities of the phantom thieves, but Good Striker appears to Kairi before the police can fully set their plan in motion. After the stakeout fails, Jim Carter stumbles into a Ganglar hideout.
Umika is excited that a famous French jewelry designer is visiting Japan. Kairi plans to steal the pendant on her necklace, which is likely a part of the Lupin Collection, but she brings up sour memories of his brother. The Patranger create a fake pendant in order to catch the Ganglar in a trap.
The Lupinrangers are devastated when one of the Lupin Collection pieces is apparently destroyed, ruining their chances to rescue their loved ones, until Kairi comes across Zamigo Delma, the same Gangler that is responsible for their disappearance, and decides to confront him.
Worried about the increasing notoriety of the Lupinrangers, the GSPO decides to hold a PR event with the Patrangers, but things turn hectic when Sakuya is transformed into a girl.
Both the Patranger and Lupinranger have trouble catching up with an extremely speedy Ganglar. Umika is able to remove his collection piece, but it is taken by a young boy who wants to be better at track, with Tooma on the case to get it back.
Tsukasa visits the amusement park on her day off where she just so happens to run into Umika at the ticket counter. The two are not only forced to share a ticket at the park, but also get chained together after running into a Ganglar in the haunted house.
The Patranger are on the case after a young boy tries to fight the bad guys, reminding Keiichirou of himself as a boy, and receive a new collection piece in the process. The Lupinranger discover that their are two Ganglar, but find that between the two of them, they only have one collection piece.
All three Patranger are rushed to the hospital, with Keiichirou having the most extensive injuries due to being poisoned. Umika and Kairi go to visit the police, but Sakuya and Tsukasa take off because their is still a Ganglar on the loose.
The Patranger examine a destroyed Ganglar's safe; a new Ganglar appears and accidentally swaps bodies with Tooma, but now likes his new body and will not switch back.
Umika becomes friends with a girl who is infatuated with Keiichiro and agrees to help with her crush, but first, they must face a Gangler with the power of trapping people within their dreams.
The Patranger fight a revived monster whose remains were previously held in HQ; Kogure tells the Lupinranger the story of Arsène Lupin and Good Striker.
After getting himself in trouble, Sakuya is suspended for two weeks, but when he realizes his friends are in danger, he must choose between his career or his duties.
A new phantom thief arrives from France and scares off a Ganglar. The next day, Kairi is shocked to learn of this when a man loudly exclaims to him that he is Lupin X, but Keiichirou then arrests him. Hilltop hears of this and barges into the interrogation room where he explains that the man is actually a cop.
As both the Lupinrangers and the GSPO have lots of questions to Noël, a new enemy capable of deflecting all attacks appears before them.
Noel finds out about Sakuya's crush on Umika and attempts to play cupid. However, his plan backfires when Umika is attacked and cannot transform unless revealing her identity.
Laimon Gaorfangue, a top Gangler member, decides to make a move in order to secure the position of Dogranio's successor, and when the instructor of a cooking school disappears under mysterious circumstances, Noël asks for Touma's help with the investigation.
The first member of Laimon's gang was defeated, and while the other two members are still on the large, a mysterious necklace draws the attention of both the Lupinrangers and the GSPO.
With his subordinates defeated, Laimon confronts the Lupinrangers and the Patrangers, who are forced to join forces against him.
Noël and Umika infiltrate an illegal auction featuring a piece of the Lupin Collection to make a successful bid for it, but the situation gets complicated when the Patrangers appear at the scene.
Touma and Sakuya start training under a mysterious martial artist, unaware that they are under the effect of a Gangler's powers.
Umika's father shows up at the restaurant on her birthday and gets the wrong impression of Kairi; the Patranger do battle with a Ganglar, but Noel thinks that the Lupinranger are better suited to deal with his powers.
The Patranger talk about throwing Noel a welcome party when the Ganglar show up and Keiichirou gets his memories stolen! The memories have turned into photographs, with several missing, and the Lupinranger are now in possession of one.
Pretending to have a vacation, Keiichiro leaves for a secret mission and Kairi approaches him to investigate, just when a seemingly harmless Gangler appears.