Castle returns next Monday, Oct. 8 at 10 p.m. ET on ABC, and according to this week's official show synopsis, it's all about the things we keep hidden. And we're not just talking about Castle and Beckett's little secret interoffice romance … 

We're talking about tucked-away trinkets and treasures, ones that could lead Caskett to their cold-blooded killer.

Check out the official synopsis below, and share your thoughts in the comments!

When a young woman is mysteriously murdered, Beckett and Castle discover her death may be linked to a repossessed storage unit up for auction. Was the unit connected to her death? Was something inside it worth killing for? The investigation leads Castle and Beckett to colorful Storage Wars-like treasure seekers and Manhattan socialites as they uncover the shocking truth."

Will you watch Season 5, Episode 3: "Secret's Safe With Me"?

Source: ABC

Credit: YouTube Photo: Castle Promo For Season 5, Episode 3: "Secret's Safe With Me" (VIDEO)

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