Hogwarts Legacy Cache in the Castle Side Quest Walkthrough and Treasure Location

Guides

Hidden beneath Hogwarts’ ancient stone halls lies a secret many students miss. The “Cache in the Castle” quest challenges you to decode clues, trace hidden symbols, and uncover a forgotten treasure tucked deep within the school’s walls.


First Hogwarts Legacy ‘Cache in the Castle’ landmark – Rhinocerous Skeleton

The first landmark in the “Cache in the Castle” side quest can be found near the large rhinoceros skeleton display inside the Defence Against the Dark Arts Tower. The treasure map shows the skeleton clearly, making it an easy point of reference. Approach the area, study the surroundings, and inspect the wall behind the skeleton to locate the hidden painting connected to the puzzle. This step sets the path toward finding the rest of the treasure clues scattered through Hogwarts.

  1. Receive the quest from Arthur Plummly across from the entrance of the Charms classroom.
  2. Go down three floors by taking the stairs behind you.
  3. Proceed forward and go down the stairs on the left. The first landmark, the Rhinocerous Skeleton, should be visible from here.
  4. Make your way to the skeleton to receive a waypoint for the next landmark

Second Hogwarts Legacy ‘Cache in the Castle’ landmark – Dragon Fountain

The second landmark in the “Cache in the Castle” quest is the Dragon Fountain, found in the Astronomy Wing of Hogwarts. This ornate fountain features a detailed dragon statue surrounded by stone benches and arches, making it easy to spot. Approach the fountain and match it with the clue on the treasure map to confirm the location. Once you examine the correct spot, the next hint will lead you closer to completing Arthur Plummly’s treasure challenge.

If you have the floo flame for the Transfiguration Courtyard, teleport there to easily find the Dragon Fountain. For those who don’t have the floo flame waypoint, follow the steps below.

  1. Head down the two staircases to reach a large double door.
  2. Go through the doors to find the Transfiguration Courtyard that has the Dragon Fountain on your left.

Third Hogwarts Legacy ‘Cache in the Castle’ landmark – Painting

The third landmark in the “Cache in the Castle” quest is a painting located in the Astronomy Wing. Approach the portrait showing a knight on a horse and cast Accio on the handle beside it to reveal the hidden chest. Once opened, you’ll receive the next clue needed to complete Arthur Plummly’s treasure hunt through Hogwarts.

  1. Proceed past the Dragon Fountain into the double doors behind it.
  2. Take the first right, and head up a pair of stairs to find the painting on the wall.
  3. Cast Accio on the handle at the top of the painting to reveal the treasure.
  4. Collect your rewards to complete the quest “Cache in the Castle.”

Many of the side quests in Hogwarts Legacy will send you around the castle in hopes of treasure. Since you’ve completed “Cache in the Castle,” test your map-reading skills with “Ghost of Our Love.”

On numerous occasions in recent years, billionaire and Harry Potter creator J.K. Rowling has taken public stances against inclusive transgender laws and trans rights, and has written fiction that has been condemned by LGBTQ organizations for its use of harmful anti-trans tropes. Hate crimes, as well as legislation that denies the rights of trans people, have become more prevalent in the U.K. since 2019, and, more recently, in the United States as well.

According to an FAQ from Hogwarts Legacy publisher Warner Bros. Interactive – the parent company of Avalanche Software, the game’s developer – Rowling is “not directly involved” with the creation of Hogwarts Legacy. Regardless, the sales and widespread attention generated by a AAA video game will benefit Rowling, and that has led some fans to decide not to buy the game. For a more in-depth explainer of the yearslong controversy leading up to Hogwarts Legacy‘s release, read AELGAMES’s breakdown.

Where to find Arthur Plummly exactly

Arthur Plummly is located in Hogwarts Legacy’s Astronomy Wing.

Exact Starting Location

Fast-travel to the Charms Classroom Floo Flame point. Exit the classroom door and find him standing right outside by a large window or statue, directly across from the entrance.

Returning After Treasure

He remains in the same spot near the Charms Classroom or Defense Against the Dark Arts tower area for quest completion. Use the quest tracker or Charmed Compass to pinpoint him precisely.

How to complete the Cache in the Castle quest after finding Arthur

After speaking to Arthur Plummly outside the Charms Classroom in Hogwarts Legacy’s Astronomy Wing, he hands over a treasure map with three landmarks to follow.

First Landmark

Head down the nearby stairs (about three floors), turn left at the bottom, and approach the rhinoceros skeleton display on your right-the quest marker updates automatically when you’re close.

Second Landmark

Fast-travel to Transfiguration Courtyard Floo Flame if unlocked, then walk to the central dragon statue fountain and get near it to proceed.

Third Landmark and Treasure

From the fountain, exit through the northwest double doors, go up the stairs on your right, and find the painting of a snowy house (with a symbol at the top).

Cast Accio on the symbol atop the painting frame to reveal a hidden chest behind it-open it for the Authentic Historian’s Uniform cosmetic gear.

Finish the Quest

Return to Arthur at his starting spot near the Charms Classroom or Defense Against the Dark Arts tower; report back for 180 XP and completion.

Rate
Shawn Wilken

With a lifelong passion for both gaming and sports, he has built a career at the intersection of these two worlds. His work is informed by a deep love for sports analytics, offering a unique, data-driven perspective. Away from the screen, he is a ded

AELGAMES