At Chateau Frontenac, a body cemented in a bath launches Céline on a new investigation.

The room in which a discovery of a person named Philippin was found was rented by a woman named Esther Smith.

Céline assaults William and Jacques removes her from the investigation; Daphne continues the work; Chamfort, with financial support from QMG, was providing Philippin with the means to carry out research in the lab.