Rosemary and Thyme (2003)

With a Royal visit planned for Wellminster Cathedral, Rosemary and Laura find themselves hired to help restore an old monastery garden at the cathedral in time for the visit, although not everyone is pleased by their presence. No sooner have they started, the body of the local custodian's step-daughter, Trish, is found by the gardeners, who soon uncover secrets within the cathedral's tight-knit community, before a skeleton is found within the garden's old well...