Romain seems to have a serious lead in the person of Manu Trabuc, a former associate of Lily's parents. Sarah, alerted by certain visions of Diego, is convinced that the child can help advance the investigation. But when Diego reveals elements of his childhood to her, Sarah understands that he can also help her find traces of her own past of which she has no memory until she was placed in foster care at the age of 4 years old.

For Romain it is now obvious that Diego's visions correspond to unsolved crime scenes. The dead turn to him to help them convey a message: that of finding them. For her part Sarah, personally disturbed by Diego's revelations, sets off in search of her past to discover what happened to her when she was a child.