The House of Dreams — Agatha Christie

Previously published in the print anthology The Harlequin Tea Set and Other Stories.

John Seagrove, a young city clerk, awakens early one morning in his London bedsit, desperately clinging to a dream that has just transformed his life. The next day, while dining at his boss's house, he meets the enigmatic Allegra Kerr. Falling in love with her at first sight, John instantly realizes this is the overwhelming joy his dream foreshadowed … but could darker forces be at work?