"Barnaby's wife Sarah arrives to take up her job as a head mistress at Causton School. Officious social worker Gerry Dawkins has an awkward encounter with an artists' colony run by horse whisperer Maggie Viviani after a fruitless visit to elderly recluses William and Mary Bingham. Two days later his corpse is fished from a river ... Barnaby visits Mr. and Mrs. Bingham, who are hospitable but vague. Mary however furtively asks him to return to see her but is killed soon after. Thirty-five years earlier the Binghams' son and daughter, Robin and Jennifer, died when their car plunged into a river. Robin's body was recovered but Jennifer was never found and has forged a new identity for herself ... Once more Jones comes to Barnaby's rescue when he confronts a killer whose family, unsurprisingly for Midsomer, has dark secrets"--from www.imdb.com.