NBC News (via Mediaite) is reporting that a Boston-based “mystery company” gave a pro-Romney political committee a drive-by $1 million donation, then disappeared.

A mystery company that pumped $1 million into a political committee backing Mitt Romney has been dissolved just months after it was formed, leaving few clues as to who was behind one of the biggest contributions yet of the 2012 presidential campaign.

The existence of the million-dollar donation — as gleaned from campaign and corporate records obtained by NBC News — provides a vivid example of how secret campaign cash is being funneled in ever more circuitous ways into the political system.

The company, W Spann LLC, was formed in March by a Boston lawyer who specializes in estate tax planning for “high net worth individuals,” according to corporate records and the lawyer’s bio on her firm’s website.

The Boston lawyer is Cameron Casey of Ropes & Gray. The political committee is Restore Our Future, a “super-PAC” that, according to NBC, “[lists] its address as being in a midtown Manhattan office building that has no record of such a tenant.”

More mystery!

You’ll find Restore Our Future’s website here, although it’s just a tarted-up CONTRIBUTE button.

The whole scheme is right in keeping with Romney’s other PAC-Man games, like using state-level political action committees (which can accept unlimited contributions) to funnel money to his national PAC (Mother Jones explainer here).

It’s not just NBC reporting this story – it’s popping all over the place. Ropes & Gray might want to batten down the hatches.