Due to an anonymous hint, the Devon Corporation is suspicious of being another Team Meteor hideout. After thorough discussion of Adrienn, Ame, Arclight, and Victoria in the Grand Hall, they have decided to infiltrate the building to confirm the information. Adrienn and Ame are stationed on the front store to distract the members whilst Arclight, Victoria, and the player are sent undercover passing through an alternative entrance via the Underground Railnet.
Little did they know that it was an elaborate trap.
Tip: Bring a Ground Type Pokémon when doing the puzzles. They are immune to electrification. Pokémons resistant to electric, like Grass or Electric, have their HP reduced to a minimum of 1.