Update.

Okay, this is not an actual piece of writing as I'm short on time and this idea is still only that, just an idea.
I'm currently on my coffee break in my creative writing lecture and have a great idea (As well as a body full of pain, long story) but yeah, firstly an apology for not writing as much as I'd have liked to, I've been super busy these past couple of weeks.

So, the idea:
Two characters, one in the past, one in the present/future, related somehow.

The character in the past discovers some kind of conspiracy/event in the future that has the potential to cripple/destroy the earth as we know it but has neither the resources or the ability to prevent it and so concocts a plan. He deposits a small amount of money into a bank account and then leaves the account details along with a note explaining the situation in a time capsule for his descendant.

In the future, the descendant finds the time capsule and so the story begins, leading him along a cross-chronological scavenger hunt, with each parcel from the past coming with another note to lead him along to the next step to prevent whatever potential fate threatens the planet.

I wanted to write this down before I forget it, it's still early days yet, but I would really really like to hear feedback on this one.

Thanks guys, and hopefully it won't be too long til my next update this time.
Craiggy.

Edit - Okay, as the lecture progressed, more ideas came to me. I am now thinking along the lines of maybe Cold War Russia as the past setting and the past character being some kind of Russian intelligence agent. The clues left would be fragmented to risk discovery by potential conspirators.

The descendent would then have to follow the clues, piecing together where the next location could be whilst also being led along a journey of questioning the plausibility of this trail, though perhaps due to some later involvement with future conspirators convinces the descendent.

Toying with the idea of a plot hook being the past character dying whilst leaving a clue, the clue then being taken away and either put into storage or destroyed, leaving the future character literally clueless and having to piece together the remainder of the puzzle themselves whilst also trying to find where the last remaining clue is stored, if it even still exists at all.

2nd Edit - Okay, I'm now, after some research, toying with the idea of this conspiracy being linked to Stalin's cult of personality and just how deep it actually ran. Possibly also contemplating the idea of adding some good old evil super science in the form of cloning, but that's really just a passing whim, not sure if I'm gonna use it or not, but some kind of super science element, or super underground intelligence network sounds like fun to write about.