The game’s most wanted criminal, no NPC in Probably Stolen can rival or challenge the mysterious (& dangerous) Lou.
And as you can expect, her cryptic persona persists in her quest, which can only be triggered and completed by playing a dangerous game. Here’s a full walkthrough on how to complete the Lou storyline in Probably Stolen.
Probably Stolen Lou quest walkthrough
Unlike most NPCs, like Serpico and Eleanor, Lou only appears on a random day after you purchase the Business Permit, available in the fifth week. During her visit, she will introduce herself before asking you for a series of ”tools” to be used on her next job. To trigger her quest and start her storyline, call Security on her and claim the 1.500 Credits bounty.

Now that you surprised Lou and made the questionable choice of turning in a specialist, a Republic Operative will pay you a visit in the next week, claiming Lou to be a traitor to the Republic and an alleged terrorist. He also gives you a Republic Transmitter and makes an offer: plant it into something and give it to Lou for 700 Credits, as she is sure to visit you again.

Sure enough, Lou will surprise you in a few weeks, inviting you to play a game and letting you know what’s at stake. The next morning, she reveals that a bomb is hidden within your wares and gives you until midnight to disarm it. Upon review, the Plastic Explosive will prove to be fake.

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Following your fake brush with death, Lou will pay a visit to the store in around five days and leave her ”Box of Toys” in your care, before warning you not to touch it. The box features a document revealing more about her past and ties with the Republic.
She returns to grab it the next day. If you haven’t moved the contents of the box (you can still read the document at no risk) or placed the transmitter in it, she allows you to pick either 1x Advanced Turbo Booster, 1x Smuggler’s Bay, 1x Backpack (Small), or 2x Module Expansion Kits as a reward.

Following the encounter above, just keep playing until Lou visits under the guise of an inspector. She reveals that her ”guest’ has finally given her the info she needs, before asking for 750 Credits (or 500 depending on your chosen difficulty) worth of weapons, armor, or meds as a trade for the bounty you received earlier. You have one week to secure it. If you can’t, she asks for the amount in Credits on the due date.

We are now at the final stretch of her storyline, as Lou will thank you and vanish upon getting the agreed-upon ”tools” (or the necessary Credits) in her next visit. This will be your final meeting, with the news of the assassination of an admiral stamping the papers the next morning. She will send you a note, though, together with a Storage Bay Expansion Kit.

Lou’s quest/storyline then ends with another visit from the Republic Operative, who reveals they plan to pursue her and hints at your involvement in the whole ordeal.
With Lou’s quest done, don’t forget to also check out how to produce Huge Nutrifruits and unlock the Green Thumb achievement.