Charlie, a discreet cop who was stationed at the complaints office, interfered with the investigation by his colleague Chris to find Anna, a six-year-old girl. Headed by Samy, the new trainee, she will discover exceptional investigator skills, inherited from her great-grandfather: Sherlock Holmes.

Charlie is the only one to take seriously the disappearance of K-Lista, an influence. Samy and she immerse themselves in the world of social media to understand what could have happened to her: easy money, jealousy, secret relationships, many could have wanted her to harm. Unless all of this is just a staging, meant to make the buzz?

Nicolas, a friend of Charlie's youth, calls him for help when he has just had a tragic car accident for Anthony, his brother-in-law, who was in the passenger seat. But then, real accident or sabotage? Immersed in the world of vintage cars, will Charlie have enough back to find out who could have done attack on his friend?

Her personal history led her to London and Charlie was determined to meet her half-sister. Samy, of course, accompanies him on his journey. On the way to visiting Sherlock Holmes' house, they meet Tracy, a young psychotic girl, who begs them to help her: her sister's ghost would have come to warn her that she was in great danger. Will they be able to prevent Tracy from suffering the same tragic fate as her dead sister a few years ago?

Jiyoung, a talented young icerman, is found dead, frozen, in the supergelator of the factory where she worked. If her professional requirement had not brought her only friends and might lead her to revenge, Charlie will discover that the young woman voluntarily returned to the freezer... but why?

George, Charlie's grandfather, is in a coma after an attempted murder. The police station mobilized to find the culprit, while Charlie was excluded from the investigation. But Charlie is determined to shed light on the case, in the back of the brigade, always with Samy's help. But she soon discovers that all incriminates her...