It was an early evening when the pups were doing chalk art on the floor. Ryder asks the pups what they were drawing, Skye was drawing a fluffy pink cloud and Rubble drew a pizza which made Chase say that it look so real that he could smell pepperoni, making everyone laugh.
At Barkingburg, the Turbots and Wally were visiting Barkingburg for the first time because Francois was painting a portrait of the princess. Sweetie wanted to pose for the portrait with the princess too. However, the Earl didn't allow her to because it was only for future queens. The princess encouraged her to watch Francois paint her portrait, this made Sweetie mad which made her sarcastically reply that was a great idea. Francois then begin to paint the portrait, the princess hoped it will be ready for the unveiling tonight, he then told her not to worry. Francois uses his secret ingredient to paint the portrait which is cheese powder.
A while later once Francois finished painting the portrait, the princess invited him to have tea and pastries. Once they were gone, Sweetie then had a sneaky plan to take the portrait by fooling Cap'n Turbot in him thinking Wally was in trouble. She told Busby to play the sound of a walrus in trouble. Upon hearing the sound, Cap'n Turbot started to panick and check on Wally. Sweetie was happy that he fell for it and stole the portrait for the princess without her realising that she left a trail of cheese powder on the floor. When Cap'n Turbot went to check on Wally who was enjoying himself in the water, he realises that Wally wasn't the one making that sound and thought something was wrong with his ears. He goes back into the castle and finds a fleck of paint on the floor. To his horror, he finds out that the portrait of the princess was missing. This makes everyone shocked about the portrait disappearing all of a sudden, the Earl decided to call the PAW Patrol.
Back at Adventure Bay, Ryder gets a call from the Earl of Barkingburg about the disappearance of the painting. He then summons the pups to the Air Patroller, Marshall wipes out with the crayons they were using to draw the mural saying he wiped out over the rainbow. In the Air Patroller, Ryder briefs the pups that they were urgently needed in Barkingburg and declares that this was a Mission PAW. He then tells Robo-Dog to put the Air Patroller in Stealth Mode.
Once they reached Barkingburg, Ryder and the pups geared up Mission PAW style. Ryder then briefed them about the missing portrait and deploys Chase and Rocky to help find it. The pups and Ryder go on the Mission Cruiser to the castle. Once they reached the castle, the princess was thrilled to see them. Ryder asks where was the last place they saw it. Cap'n Turbot replies that they left it on the easel and it dissapeared. Ryder tells Chase to find clues near the easel, while finding clues he found the cheese powder on the floor. Ryder tells Chase to keep following the scent of the cheese powder, once he couldn't find anymore cheese powder, he then tells him to use his Night Vision Visor to find anymore clues. He found pawprints on the floor going down the hallway and finds out it stops on the wall and found more spects of paint.
Behind the door, Busby was busy replacing the portrait by putting another piece of painting of Sweetie over it and she then decided to sneak the painting back into the throne room for the unveiling ceremony. Meanwhile outside, Ryder tells Rocky to use his x-ray scanner to see if anything is behind there. He then finds out someone is behind the wall and found a button to get in. They managed to open the door and found out that Sweetie has the portrait of the princess. Ryder asks Sweetie where is the royal portrait but Sweetie lies that she didn't know what he was talking about and says that it is a picture of her. Chase finds out that it is the same smell of Francois' secret ingredient (cheese powder). Sweetie then escapes by a trap door and rides on her motocycle to run away with the portrait.
Ryder realises that Sweetie wouldn't be running away unless it was really the portrait of the princess, Chase mentions that he knew that it is definitely the painting because of the cheese scent. Ryder and Chase goes to catch Sweetie with the painting. When Chase uses his laser grid to stop Sweetie, she then transfroms her motocycle to a sky cycle and telling Chase that it was a nice try sarcastically and laughs. Ryder then deploys Skye to go catch Sweetie on her air cycle. Sweetie decided to change her plan so she decided to show it up over Barkingburg to see it so she could become queen.
Skye goes on her air cycle to find Sweetie and asks her why she is running with the painting, she then replies saying that it has her picture on it and show it from the highest point of the town which is Big Benji. Skye asks her to give the painting back but Sweetie wouldn't want to. However, her plan backfires when she went upside down which made Busby hit the eject button on her air cycle. Which made her fall on to the arrow of the clock, calling for help at the same time. Ryder tells Skye to get the painting while he and Chase goes to rescue Sweetie. Chase then goes up a ramp to go save Sweetie and gets his landing pad so he could land there safely.
While Skye goes to get the painting from Sweetie's air cycle, the painting and Sweetie's chew toy falls out of the grabber's air cycle. Skye goes to get it before it drop in the water. Luckily, Wally who was in the water manage to catch it and Skye uses her grabber to take it from Wally and pass it to Francois. Once Ryder, Chase and Sweetie return, the princess scolds Sweetie for taking her portrait and Sweetie tells her that she didn't take it. However, her true colours were shown when the portrait of Sweetie came off to find out that it was the portrait of the princess.
At the Unveiling Ceremony when the Earl reveals the painting, everyone was clapping. Upon hearing the clapping outside, Sweetie is confined to her dog house, she then adds that she should be on the painting. Cap'n Turbot, Francois and the princess thanked Ryder and the pups for saving the portrait. Ryder then tells her if her painting vanishes, she just has to yelp for help. The episode ends with Wally eating fish from the Butler.