Rosie is on the case!

In Season 4, episode 5 of Lifetime’s “Devious Maids,” Rosie (Dania Ramirez) came one step closer to uncovering what had happened the night Peri (Mariana Klaveno) was gruesomely murdered — and she learned it involved the shifty socialites of Beverly Hills.

Rosie, whose husband Spence (Grant Show) was being accused of killing his ex wife, followed her instincts in thinking that Ben (Carlos Ponce) had something to do with the death of Peri. And she was right! She learned that Ben was drugging Spence, which explained why he was able to coerce Spence into confessing that he allegedly killed Peri. But that’s not all she uncovered. Rosie also discovered that the drugs Ben was slipping to Spence was given to the corrupt character by Kyle (Brian Hallisay) … Ben’s younger brother!

Rosie went to Genevieve (Susan Lucci) with the clues she found, including something she heard about “The Circle” — a statement that stopped Genevieve in her tracks. Genevieve was given a book by her younger suitor based on “The Circle,” which the flashy Beverly Hills native describes as a cult.

And in episode 6 of the sizzling, summer series, Rosie will take this new information to solve the case … with Genevieve as her sidekick. The Sherlock Holmes and Watson duo will continue to prove Spence’s innocence in the Season 4 episode “The Maid Who Knew Too Much.” But according to the synopsis, things will “grow increasingly dangerous” for the crime-solving duo.

Meanwhile, Marisol (Ana Ortiz) will butt heads with her new director while Carmen (Roslyn Sanchez) takes advantage of her relationship with Daniela (Sol Rodriguez) during an audition. The summary dishes that Carmen will pretend to be her mini me while auditioning for a role.

“Devious Maids” airs Mondays at 9 p.m. EDT on Lifetime.