Ingrid and Lola: a duo at the top!

Basque country, the middle of winter. The body of a shepherd is found at the bottom of a steep, craggy valley. The police deem it a suicide, but no one's buying it.
Ex-commissioner Lola Jost is called to the scene and brings along her faithful partner, striptease artist Ingrid Diesel.
Lola soon sniffs out a lead in Novavita, a chain of nursing homes sullied in the press by a recent scandal. There's just one problem: how to infiltrate their private establishment in Ciboure? What if she and Ingrid teamed up as a musical duo and got hired to perform there? But time is of the essence: a new victim has been found at the foot of a cliff...