The Disappearance-Disparue (season 1)

This is a French drama TV series. The main story line takes place in Lyon. One of the most beautiful and funny festival is taking place in the city. It is a Music Day. A young seventeen-year-old girl named Lea Morel with her cousin go to the celebration to have fun. But expected good time turns out to be a tragedy for the Morel family. Lea disappeared. The police catches the case and begins to investigate under the leadership of commissar Molina.