While investigating Lester’s mysterious “accidental” death, the clues lure Charles, Oliver, and Mabel out of Manhattan — and straight into some dangerous new “old” territory.

A look back at Lester’s early days at the Arconia reveals how a young dreamer became a steadfast doorman — sacrificing his future to protect the residents from the building’s secrets.

The trio stumbles upon a crucial piece of evidence... and promptly compromises it. With time running out, they scramble to solve the mystery before the police close in on them.