After six thrilling seasons, Spiral is back for a seventh series of criminal investigations in Paris, as it embraces the various perspectives of those involved in the judicial system: the police and the judicial authorities. Berthaud and Gilou are being brought back together by a double homicide in a Chinese restaurant located in the district of Belleville. One of the victims is the team's esteemed former superior. All of them will have to face unexpected hurdles and solve a dilemma: give up the truth or betray the institution they have faithfully served.