Character A and B share a youtube channel that does reasonably well, but not quite as well as they'd like, and one dat get their hands on what appears to be a code or 'treasure map' of some variety with everything on it well-coded. It comes into their possession by accident as they find it in a library book one of the characters took home from the university library.
They share its progress on their channel and make it a habit to try out the most upvoted suggestions, which makes them go viral. The hype surrounding their series gets bigger and bigger and, quite frankly, soon enough it becomes bigger than what they could possibly deliver, but they just ride that high without really considering the consequences.
Then someone who claims to know exactly what to do gets upvoted like crazy and, once he/she has proven to indeed know more, starts making increasingly risky demands that the duo feels compelled to comply with, now that they are neckdeep into this and not quite willing to let their newfound fame die down.

What I'm looking for:
- Decent English. It's not my native language, so I'm definitely going to bitch on a mistake or two, it happens, but it has to be well-readable. The characters are the ones cracking codes, not us.
- Effort in a post. I hate 'enforcing' a bare minimum, but I do prefer it when me and an RP partner write posts with similar levels of content. For me posts tend to range between 300 and 500 words. No particular reason why, that just appears to be my sweet spot. So someone who can match something like that without a need for filler that doesn't add anything would be great.
- I'm fine with the antagonist becoming pretty extreme in his or her demands, but I do want there to be proper build-up. The characters are 100% fair game to be dragged through hell and back, as long as the progression of events makes sense, basically. Let's make it juicy, but solid.
- A pro-active partner. I don't want to be the only one dragging the thread along.

Feel free to ask if you'd prefer to see a sample of my writing first.