In the thrilling third episode of "Murders in the Building" season 4, the trio of amateur sleuths, Mabel, Oliver, and Charles, team up with their Hollywood counterparts to delve deeper into the mystery surrounding Sazz Pataki's untimely demise. As they navigate the intricate web of clues, the group discovers that filming a movie at the Arconia is not as straightforward as it seems. Tensions rise as they face opposition from residents who are wary of the disruption, leading to a confrontation that leaves them shaken.

Meanwhile, Mabel finds inspiration in her interactions with Longoria, a renowned actress, and decides to take matters into her own hands. Her bold move leads her to Dudenoff's apartment, where she uncovers a startling revelation. As the investigation progresses, the trio realizes that the murder is more complex than they initially thought, with new suspects emerging and old alliances being tested.

With the pressure mounting and the stakes higher than ever, the group must work together to unravel the truth before it's too late. Will they be able to solve the case and bring justice to their friend, or will the darkness that lurks within the Arconia consume them?