Scrooge, Huey, Dewey, Louie, and Webby arrive in Istanbird to search for the Split Sword of Swanstantine, a famous sword that is key to their success in defeating F.O.W.L. Scrooge is surprised to see that Violet and Lena are also with them as they were at a sleepover and were told to come along, hence the two are still in their pajamas. Nevertheless, Scrooge welcomes them onto the team. The sword is split into three parts, the hilt, the guard and the blade and they must search for the three pieces. Black Heron reveals herself and begins to fight Scrooge who orders the kids to split into groups and search for the pieces while he handles the F.O.W.L. agent and continues to fight her throughout the episode.
Dewey and Webby vs The Blind Heavens
Dewey and Webby discover the hilt is on top of a monument on a tower under renovation. They spot Gandra Dee who throws a flash bomb at them, causing them to go blind. Dewey and Webby proceed to climb the tower despite their limited vision. While Webby is being cautious, she recognizes that Dewey is somehow managing the climb despite his lack of vision. She deduces that it is due to his inner confidence as he is throwing caution to the wind. Webby, nervous, manages to follow his lead, especially when Dewey's vision returns just as he is about to nearly fall off the tower. Webby rescues him in time and the two confront Dee. She throws another flash bomb, but Webby kicks it back, turning the tables on her. Dewey and Webby secure the hilt.
Louie and Violet vs The Spicy Underworld
Louie and Violet search for the guard with the former deducing its location to the Spice-A-Torium, an underground club run by criminals who specialize in stealing and tasting various spices. Louie reveals that he has made himself notorious by claiming himself as the "Silver Tongued Serpent" and introduces Violet as the "Violent Saber". They find the guard, but the owner reveals that John D. Rockerduck is also after it. They hold a spice off where the first person to sweat is the loser. Louie, realizing he has made a mistake, attempts to cheat, but is nearly caught. Violet tastes the spices for him and apparently succeeds. When Rockerduck exposes him as Louie, everyone is instead amazed that he is famous after all. Rockerduck sweats under pressure, losing, and Louie and Violet leave with the guard. Violet concludes that their inner strength was the truth before proceeding to cool her mouth off in a nearby water trough due to the spices kicking in.
Huey and Lena vs The Savage Splendor of The Earth
Huey and Lena immediately find the blade in the ground and pry it out. They are confronted by Steelbeak who charges at them. However, Lena uses her magic to trap everything within the split second of Huey's mind so that they can work out a way to take him on. Not wanting to fight, Huey decides to run simulations to see if he can diplomatically handle Steelbeak, but all simulations fail. Lena finds a door labeled "The Duke of Making of Mess" and opens it to find a savage version of Huey. Huey reveals that he hides that part of himself as it is not who he is, but Lena tells him that that is what they need. Huey finally gives in and awakens to the real world where he manages to take on Steelbeak and physically defeats him.
Scrooge and Black Heron continue to fight with all the kids gathering with the pieces. When the F.O.W.L. agents all come together, they threaten the group and Scrooge tells the kids to drop the pieces. The sword comes together, but when Black Heron grabs it, the sword shocks her and floats to the Duck Family. Scrooge explains that the sword only answers to those with inner strength, the children used theirs to obtain each piece, and the children are Scrooge's. With the sword in hand, Scrooge & the children are all adorned in armor and threaten the F.O.W.L. agents who all retreat. The group celebrate by using the sword to slice themselves some kebabs. Elsewhere, the F.O.W.L. agents report to HQ revealing that they succeeded in the real mission, to obtain a feather from one of the ducks.
- David Tennant as Scrooge McDuck
- Danny Pudi as Huey Duck
- Ben Schwartz as Dewey Duck
- Bobby Moynihan as Louie Duck
- Kate Micucci as Webby Vanderquack
- Libe Barer as Violet Sabrewing
- Kimiko Glenn as Lena Sabrewing
- Flula Borg as Spice Baron
- Jameela Jamil as Gandra Dee
- John Hodgman as John Rockerduck
- Jason Mantzoukas as Steelbeak
- April Winchell as Black Heron
- Keith Ferguson as Ugly Mug
- Rob Paulsen as Host
- This is the second speaking role of Steelbeak in the reboot.
- Rob Paulsen, the original voice of Steelbeak, voices the host in the episode.
- The name Swanstantine is clearly a pun on Constantine.
- The Spice-A-Torium does not take checks from Flintheart Glomgold.
- Slash Smashnikov from "Woo-oo!", Clown and Capsule from "Astro B.O.Y.D.!", and several of Don Karnage's Air Pirates from "Sky Pirates...in the Sky!", such as Ugly Mug, appear at the Spice-A-Torium.
- Huey's angry side is referred to as "The Duke of Making a Mess". This is what he calls himself when he is angered in the episode "The Infernal Internship of Mark Beaks!".
- Lena and Violet are seen in their pajamas throughout the entire episode.
- Lena's shoes are also absent, likely because Scrooge told everyone to get on the plane during a slumber party.
- Lena could've just used her magic to change herself and Violet into their clothes before getting on the plane, but was unable to due to being in the rush at the time.
- March 19, 2021 (United Kingdom) (Premiere on Disney+)
- December 8, 2021 (Italy) (Premiere on Disney+)
- April 19, 2022 (Portugal)