The story in short:

Annika is invited to take part in a concert in Cremona, Antonio Stradivari's city. Four magnificent instruments by Stradivari are on display in the concert hall. During the concert, suddenly the light goes off and causes a total chaos. Once the problem is solved out and the light switched on again, it is clear that a bigger drama has taken place: a precious violin is missing! Annika is one of the main suspects, but she'll do her best to help the Commissario solve the case.

The book also contains several entertaining exercises, which will help you learn faster: "Read & Learn", Focus on Grammar, Solutions, Dossiers 1 + 2