Facing a series of complex murder cases, new police commander Hélène Bach must learn to work with the brilliant yet exasperating Raphaël, who can make the dead speak like no-one else.

We are in 2015: a young couple settled in a beautiful Provencal house haunted by the ghost of a little girl, who died in 1969 under mysterious circumstances. In 1986, another family lives in the same house and is confronted with the disturbing friendship between their daughter and the ghost. What has really happened in 1969, Elise how she could drown?