Singers and musos are gathered for a weekend folk music course  in the fantastic country mansion named Fiollymead. Most come only to sing or listen, but one or two have musical scores to settle. When Liri Palmer sings: Black, black black is the colour of my true-loves heart! His tongue is like a poisoned dart, the coldest eyes, the lewdest  hands… She clearly has a message for someone in  the audience. Passions run  high – something is brewing at Follymead. Among the music students are Tossa Barber and her boyfriend Dominic Felse. And when disaster strikes, Dominic can privately enlist the aid of his dad – Detective Inspector George Felse.