Inhalt: Maggie Flynn isn't your typical 1960s mum. She's a spy, an unsuspecting operative for MI5, stalking London's streets in myriad disguises. Widowed and balancing her clandestine career with raising a Beatles-mad teenage daughter, Maggie finds comfort and purpose in her profession - providing a connection to her late husband, whose own covert past only surfaced after his death. But Maggie's world spins out of control when a chance encounter with a mysterious Russian agent triggers a chilling revelation: he knew her husband. And what's worse, the agent suspects someone on home soil betrayed him. As Maggie searches for answers, she'll question everyone—and everything—she thought she could trust. In the murky and perilous world of espionage, can she outsmart those determined to keep her silenced?