It's a brutally cold winter in 1880s Sweden, Mika is at an orphanage trying her best to keep herself and everyone else there alive. A mysterious killer named the Night Raven is on the loose, and Mika gets herself involved in the case. Can she help stop the killer with her observational skills? As an adult I didn't find the situation completely believable, but as a kid this book keeps on the edge of your seat.