Just days after meeting, Arthur Weiss and Annie Jones embark on a honeymoon in Rome. Arthur, a young fitness instructor, and Annie, a secret service agent on her first undercover assignment, find themselves swept up in a series of unexpected adventures with startling consequences.

As they forge new alliances and reconnect with their families and the past, Arthur and Annie must navigate a web of unknowns and decide their next move. Their journey takes them from one thrilling escapade to another, introducing them to a variety of gadgets and an AI. Together with their friends, Arthur and Annie must unravel the mystery of their assignments and the intrigues behind them.