African ,Nigerian Scam?

Im being askd to recieve 20 million dollars . and to put the money into a afe Box. And the person doesnt want anyifnormation from me but the fact that he wasnt for em to keep 30%. he asks for me to say nothing to anyone and for me to only contact him on email. I see where the peopel usualy ask for bank information and such, but this person only wants for me to recieve the money out it in a box and send him a key. what do u think this is a laundering scam.