This drama tells the inside story of two of the most famous addresses in the world — Buckingham Palace and 10 Downing Street — and the dramas, romances, and machinations behind the great events that shaped the second half of the 20th century. Two houses, two courts, one Crown.

After losing her grandmother, a young girl named Nelly helps her mother clean out her grandmother's house. When Nelly ventures into the woods around the house, she meets a girl her own age, and they begin to build a treehouse and start a remarkable friendship.

Mendel is a Mexican biologist who lives in NYC but is preparing to return home following the death of his grandmother. His home is nestled in the otherworldly Monarch butterfly forests of Michoacán, and his travels prompt an intensely inquisitive personal journey, a reflection on his hybrid identity.