The Mistress of Mystery

The Mistress of Mystery is a side quest in Fallout 76.

Background
Olivia Rivers betrayed her mother and the Order of Mysteries, selling them out to the raiders. With Olivia's login, the Vault Dwellers should be able to gain access to the Headmistress' office and finally get some answers.

Walkthrough

 * With Olivia's code in hand, the player can access the Headmistress' office by accessing the terminal and logging in as Olivia. Then it's a matter of authorizing access through the administrative actions menu.
 * On the Headmistress' terminal, the player can learn the entire sad history of the Order. However, to advance the quest, they only need to read the first entry, which will reveal that Olivia wanted to meet her mother at a secluded location northeast of the Top of the World. The player simply has to head there and collect the items from the bodies, then return to the Riverside Manor, log in as Shannon Rivers, and authorize the promotion. Thus concludes the quest line.
 * However, if one wants to do the optional objective to learn more about the location where Olivia and Shannon were to meet for the last time, follow the objective marker to Shannon's terminal in her study and look for the entry under "Personal Journal" marked in September 2077. From there, head to the burned out, gutted room to access Olivia's terminal in the corner on the second floor to access a similar entry in September 2077 from the journal entries salvaged from the terminal's damaged condition because of the fire that gutted the room.