Keeping secrets is a very bad idea.

Former teenage runaway and new single mother Nadia Armstrong moves to Kingston to turn her life around. But six months after she rents a low-end apartment, her body is found at an isolated construction site. Major Crimes begins piecing together her last days, uncertain if it is a case of suicide or murder. To make matters more difficult, a member of the team is leaking information, putting Staff Sergeant Rouleau in a precarious position.

Meanwhile, Officer Kala Stonechild's niece, Dawn, is secretly corresponding with her father, who's out on early parole and turns up in town uninvited.Dawn's friend Vanessa is also keeping a dangerous secret - her relationship with an older man named Leo, who preys on young girls. And it's not long before he has Dawn in his sights.