Light Sci Fi AU. Jeanlisa.
L.I.S.A. (LISA Information Synthesis and Analysis) is an information system Jean's been using.
Jean, an agent, uses LISA every single day.
Eventually, gets deeper into the system. Their interactions become less query, response, and more ... conversational.
Jean pieces together LISA is actually a human somewhere. LISA's human brain is somehow special and can process information in ways computers can't.
(Maybe they have a conversation about how pulling her out will result in her likely losing half her life, but LISA wants it. Whatever this is isn't living.)
With LISA's help dodging the security system, Jean manages to locate and free Lisa. Jean suggests they leave false trails in the system, and LISA, though disinclined toward disorganized information much less disinformation, does, realizing their safety may depend on it.
They escape and drink tea.
(This, of course, takes down the super fast high quality search engine / intelligence system, but the administrators can access the information. Via the old methods. The computers are not much slower, but analysis and synthesis of data is. They chase the fake leads. But that's all for Volume 2 in which Lisa reveals they were trying to make clones of her brain, and now Jean and Lisa are on a quest to deal with that.)