Mr. Finch receives a call from his field officer in Prague and explodes in anger when he learns her “cleanup” at the Four Seasons has gone wrong, even escalating into an armed confrontation with a U.S. embassy employee. Concerned about secrecy around Threshold, Finch places a secure call to the U.S. ambassador in Prague to address the fallout.

At the Four Seasons, Field Officer Susan Housemore finishes restoring Katherine Solomon’s Royal Suite to its original condition after a sleepless night. Housemore reflects on how the assignment began around 4 a.m., when Finch issued an unusually specific directive; without asking questions, Housemore retrieved a pre-delivered package and unpacked specialized components for the job.

Housemore recounts executing Finch’s instructions by dressing in black and carrying an elaborate spiked headpiece, a silver spear, and a bottle of foul-smelling liquid. Following Finch’s timing, Housemore performed a trancelike march across the Charles Bridge—an act that meant little to Housemore but visibly terrified Robert Langdon and helped trigger the chaos that followed.

Interpreting Finch’s intent as psychological warfare designed to disrupt and disorient, Housemore considers the operation a success after learning Langdon pulled the fire alarm and evacuated the hotel. She confirms to Finch that a thorough search of the suite turned up no printed manuscript, including in the open, unused safe, and she completes her cleanup.

Before leaving, Housemore removes a hidden surveillance device: a Sennheiser parabolic microphone and FM transmitter concealed among drooping red, white, and blue tulips sent by the U.S. embassy to Katherine Solomon, accompanied by Ambassador Heide Nagel’s congratulatory note. With the listening device pocketed and the flowers fluffed back into place, Housemore departs, drained, to finally get some sleep.