Victoria Hamilton is urgently looking for an assistant to organize an unusual Christmas ball in an old mansion in Cambridge. Samuel Weaverby, a charismatic and risky broker from the City of London, comes for an interview. Despite the dissimilarity of characters and qualifications, they need each other's help to avoid pressure from their parents. Moreover, for the sake of the interests of the case, they enter into a fictitious engagement, not suspecting that they are gradually falling in love with each other...