"Borrowed Time" takes place at a secret address, which is emailed to ticket holders on the day of the performance. The location looks unprepossessing, but like a speakeasy or an ancient tomb, it reveals trick doors and secret passages. One of its anterooms turns the audience into shameless treasure-seekers, ransacking drawers and cupboards for clues. It's too thrilling not to recount in detail afterward -- except that not knowing the details is part of the thrill.