A fresh-faced gym instructor, Murdo Caldwell, threatens the cosy lifestyle established in the seedy Adonis Health Club in Glasgow, where, up until now, sex ‘n’ sleaze have been the order of the day. Charley and Donald, who have established a comfortable living at the club, plot to get rid of Murdo and his ideals of creating “a wholly healthy Glasgow… a city of perfectly proportioned sinuous but not over-developed physiques.... a city of non-smoking non-drinking joggers ... a city of reposeful but alert minds.' But who will win the battle of minds rather than bodies?
