There is much excitement in the Cornish seaside village of Pentrillick. Sea View Cottage has been sold to Brett Baker, a playwright of some note and the creator of several popular, television, situation comedies. Consequently, when Brett offers one of his unperformed murder mystery plays to members of the village drama group for their next production, everyone it seems wants to be involved. Soon after rehearsals get underway a series of strange events occur which bear uncanny similarities to the play. Due to a lack of clues and a seemingly lack of progress by the police, sexagenarian twin sisters, Hetty and Lottie, attempt, just for fun, to see if they can establish who is behind the crimes, with of course a little help from their friends. 'Tea and Broken Biscuits' is a light-hearted story and the fourth in the Pentrillick Cornish Mystery Series located on the south coast of West Cornwall.