Asked on Thursday to name the people involved in his own family vault, David M., 44, confidently named his wife, hesitated, offered "Steve?", and then fell entirely silent.

The vault, it emerged, involves his wife, his attorney, and a brother-in-law — Ron, not Steve — holding a recovery role David had personally arranged eight months prior and immediately, completely forgotten.

"I set it up. I just didn't… retain it," David said, of an arrangement on which his family's entire future quietly depends. A simple local record, kept the whole time, knew every name he could not.

A plan only one person remembers is a plan with a single point of failure — and the point is him.