The hero of Mikhail Galustyan, known in our world as KarlOson, lives in a magical and colorful world of metrics - chubby flying big-ear humanoids one meter tall, whose mission - to help kids. Metrics can show themselves to children, but are forced to carefully hide the fact of their existence from boring adults.

1829年，尼古拉·果戈裡，年輕的第三局記錄員，他自己的詩集淺薄平庸，靠買賣焚燒自己的詩集製造銷量。果戈裡和探員尼雅科夫調查一起疑團重重的年輕女性系列兇殺案，因為當地人傳言，兇手是名為黑暗騎士的魔鬼，必須借助來自黑暗的力量來對抗黑暗，因為在這個世界裡沒有光明……