It's in the 1970s. Kate Malarkey is fourteen, wears oversized glasses and a dental plaque, surreptitiously reads The Lord of the Rings, and has little hope of making friends. When Tully Hart, "the coolest girl on the planet", moves into the house next door, Kate is sure that friendship between them will not happen. But Tully, whose life seems perfect from the outside, has her own secrets. A misfortune that happened to Tully at a school party pushes the girls towards each other and becomes the beginning of a friendship that is destined to change the lives of both. But even in the strongest friendship there is a place for envy and rivalry. Tully is pretty, ambitious and ready to do anything to fulfill her dream of becoming a TV journalist. She shines so brightly that she overshadows the quiet Kate, who dives after her into the turbulent world of TV news, although she secretly dreams of something completely different. After spending years in the shadow of her best friend, Kate wants one thing - to find her own path. Thirty years later, Kate and Tully are still true to their once vow - "best friends forever." It seems that friendship carried through so many years will overcome any trials. But can she survive the betrayal?