Mod:Fallout: The Frontier/Endless Sleep

Endless Sleep is a Crusader side quest

Upon completion of Forging the Sword of Laban II Mollie will tell you that they got the service elevator nearby to work and wants to know if you'd be willing to join her in seeing what's down there. If you choose to not join her then she will decide to head down there on her own.

Quick Walkthrough

 * During I Don't Want to set the World on Fire in the factory you will receive a notification that Mollie has gone missing in RobCo Tower.
 * Prelate Lorene will run up to you when you go back to RobCo Tower.
 * Enter the RobCo Testing Vault via the service elevator on the R&D floor.
 * Upon finding Mollie in the kitchen area the player will note that she has been dead for a while.
 * Escape from the Securitrons and inform Lorene that Mollie is dead.