Serial Thriller in De Meern is a small, independently run detective escape room operating under the fiction of the 'Nocturne Intelligence Agency'. In the 75-minute case American Geisha you investigate as a detective the sudden disappearance of Yumiko: adopted by American parents, returned to Japan to trace her origins, and then vanished without trace. It is deliberately an investigation room, not an escape room — it revolves around studying clues and reconstructing a human, tragic story. On escapetalk the room scores an exceptional 9.1 out of 65 reviews, with a 9.6 for service: the personal hosting is the product here. Practical drawback is the limited opening times (mainly weekends) and the thin online presence of this young venue.