Asterix crosses the channel to help second-cousin Anticlimax face down Julius Caesar and invading Romans.

After a whirlwind romance in Monte Carlo with handsome widower Maxim de Winter (Armie Hammer), a newly married young woman (Lily James) arrives at Manderley, her new husband's imposing family estate on a windswept English coast. Naive and inexperienced, she begins to settle into the trappings of her new life, but finds herself battling the shadow of Maxim's first wife, the elegant and urbane Rebecca, whose haunting legacy is kept alive by Manderley's sinister housekeeper Mrs. Danvers (Kristin Scott Thomas).