Labyrinths

Upon Discovery arrival at the Archive, archivist Hy'Rell leads Burnham to the manuscript purported to contain the last map piece. She also gives Book a cutting of the World Root, a priceless piece of his culture following the destruction of his planet. Burnham is transported into a mindscape simulation where she is tested for her worthiness to find the Progenitors' technology by an AI, in the form of Book, while Book and Rayner fight off attacking Breen forces. Burnham eventually admits that she's driven by her fears of failure and loss, passing the AI's test and earning the location of the map piece. She is also given additional information on how to access the technology once at the map's destination. After Discovery copies the completed map, Burnham gives it to Ruhn in exchange for a promise not to destroy the Archive.

Summary from Wikipedia, CC BY-SA 4.0.