Set in a fictional European country in 1924, a Japanese exchange student meets a mysterious, brilliant girl who only leaves the library to sleep.

Gosick takes place in 1924 in a small, French-speaking fictional European country; which stretches from Switzerland, through the Alps between France and Italy, to the Mediterranean Sea.

The early episodes mostly focus on Kazuya and Victorique getting involved in different criminal cases and their struggle to solve them, at the same time forming important bonds with different people and each other.

Its sequel series, Gosick New Continent, takes place in 1931 in New York City, where Victorique and Kazuya are a couple and own a small detective agency.

A new series titled Gosick New Continent started on December 25, 2013, following Kazuya and Victorique in 1931 after they moved to North America following the events of the main story.

[8] A manga adaptation, illustrated by Amano Sakuya, was serialized in Fujimi Shobo's Monthly Dragon Age magazine between the January 2008 and May 2012 issues.

Gosick was adapted into a 24-episode anime television series by Bones under the direction of Hitoshi Nanba and script supervision by Mari Okada.

[17] Anime News Network's Carlo Santos commends the first volume of light novels for "a mysterious, elegant atmosphere and an intricate plotline [making] this a thrilling read from start to finish".