The House on the Strand.

"The House on the Strand" by Daphne Du Maurier introduces Dick Young, a man at a crossroads in his life who agrees to test an experimental drug developed by his biophysicist friend, Magnus Lane. This mysterious substance transports Dick's consciousness back to 14th-century Cornwall, allowing him to observe the lives and intrigues of people who lived centuries ago. He becomes deeply absorbed in this vibrant medieval world, particularly the story of Roger Kylmerth, a steward, and the noble families he serves.

As Dick repeatedly escapes into the past, his modern life, including his strained marriage and responsibilities, begins to pale in comparison to the excitement and drama of medieval England. The line between his present reality and the historical visions blurs, leading to unsettling consequences and a growing addiction to the escape the drug offers. This blend of historical fiction, psychological drama, and a touch of the supernatural explores themes of escapism, identity, and the allure of a bygone era, leaving readers to question the true nature of reality and the price of longing for another time.