Numb3rs Fanfic Finders

I'm sorry to say that the information that I have on this fic is very vague. I read it some time ago.
Charlie is involved in a hostage situation and is given the task of hacking somewhere to get a large amount of money quickly. I could be wrong about this, but my impression is that Don was in some kind of danger and was used as a incentive to get Charlie to get the money. I remember Megan being there also as well as David, not sure of Colby. It ended in a way that they had to explain to someone in authority how Charlie managed to get so much money from different places, millions in fact. I think the fic was gen also.
I know that this is all so vague that I'll be lucky anyone will recognize the fic, but it doesn't hurt to try.
The major fact that I remember was that Charlie was rather cool under pressure when hacking. I know there's at least one fic where this kind of scenario occurs and he falls apart completely, and that's not the fic I'm looking for.
Thank you in advance for your tips and I'll keep looking on my own also.