Della goes on secondment to the rural Carmarthenshire museum in order to oversee its re-opening. Caleb becomes plagued with visions of the past.

Della tries to get a blockbuster for the Museum, Caleb discovers a painting of the legend of the lady of the small lake, which brings up some haunting memories.

Della succeeds in securing the notorious Mold Cape for the Museum, but is worried that Fioled might try to get her hands on it. An art squad detective visits the Museum.

Tensions run high when Annette from art squad continues to ask difficult questions. On the night of the opening, Annette finally arrests her suspect.

With the net closing in on her, Della makes a devastating decision which brings the missing Rembrandt saga to an end once and for all.

The stolen Mold Cape is recovered. But is this the only thing Fioled will take to the grave with her, or are there more secrets to be unearthed?

In the penultimate episode of the series, Della's life takes a major turn for the worse. Having quarrelled with Sadie, her best friend seeks out Elfryn, who confides to her that he's made a major discovery regarding the authenticity of one of the Museum's most valuable paintings.

In the final thrilling episode of the series, Della's life is in tatters. Having betrayed her husband and son, she decides to leave the marital home - but not before making a startling discovery.

As Della starts her new job as the Museum's General Manager, her relationship with her son's friend, Caleb, intensifies. But what are Caleb's intentions? Why is he pursuing a relationship with both mother and son?

A look at ongoing restorations, repairs and upgrades being made to the 250-year-old British Museum.

An attractive young man, Caleb, visits the Museum and meets its Director General, Della Howells. She succumbs completely to him, and they embark on a passionate affair.

Della's relationship with Caleb is intensifying and a morning visit to Caleb's house has developed into a habit. But how long will the lovers be able to keep their affair a secret?