Gavin struggles to keep his romance with Cheryl under wraps. Brian starts acting strangely when a blood bank sets up in store. Charlie makes a huge decision.

Brian panics when Margaret spots an unwelcomed guest on the shop floor. Meanwhile, a much-in-love Gavin begins to worry that Cheryl isn't what she seems.

A treasure hunt is held to celebrate 50 years of Valco value. Meanwhile, despite his best efforts, Gavin can't avoid confronting his and Cheryl's situation.