Jenny is sent to the Mercury Theatre by the jealous wife of the owner, to dress and spy on upcoming actress Lilith Erikson. She finds a woman as astonishing in her performance as she is provocative in nature. As Lilith’s star begins to rise, rumours circulate that she has made a pact with Melpomene, the Greek Muse of Tragedy, to become the greatest actress ever to grace the stage. But Lilith is not the only one affected. When strange and disturbing events begin to take place around the theatre, Jenny finds herself wondering if the rumours are true, and fears when the Muse comes calling for payment, the cost will be too high.