Lovejoy takes Charlotte to an Antiques Fair at Cambridge, where the elderly Doncaster sisters, who have financial problems, invite him to value their belongings. Lovejoy finds what seems to be a very rare bible, but the sisters' brother, a Cambridge don, opposes its sale. Lovejoy then discovers the bible is a fake and suspects mischief. Meanwhile, Beth's father wants her to leave Lovejoy Antiques for something better.

Lovejoy is invited to spend the weekend with Charlotte at her best friend's house. The friend is short of money and has a clock she wants valued, but Lovejoy finds a stuffed fish which is worth selling, and misunderstandings arise... Meanwhile, Tinker is keen to thwart Charlie Gimbert's plans to turn Felsham Hall into a health farm, and after studying a twelfth-century charter he starts grazing a flock of sheep around the Hall. Charlie responds by threatening to evict Lovejoy Antiques from the stable yard, so Tinker and Beth take a trip to a health farm.