Henry Jekyll (Michael Caine) is a melancholy man. His wife died of pneumonia, and he seeks the comfort of his sister-in-law, despite her father's refusal. Jekyll throws himself into his work, developing a personality-splitting drug that allows him to wreak brutish havoc as his alter-ego, Hyde. However, when Hyde becomes more prominent, and Jekyll's antidote begins to lose effect, the police become suspicious.
When she meets a hip television director, a young woman is swept into the world of London's lavish sixties nightlife. However, her lust to belong to the scene doesn't even begin to quench her thirst for fun, as she drifts from clique to clique looking for an unattainable sense of belonging.
It is 1912, and the shadow of war looms over a wealthy family. As they celebrate their eldest daughter's engagement in their lavish Yorkshire manor, they're interrupted by an ominous police detective who is investigating a young woman's suicide, and what role each of them played in her death.
