Joanna Teale, enduring the loss of her mother and her personal fight with breast cancer, immerses herself in graduate research in the seclusion of rural Illinois. Her studious isolation is interrupted when a young, bruised child, Ursa, mysteriously appears at her cabin. Claiming to be an extraterrestrial on a mission to observe five miracles, Ursa's presence draws Jo into a web of wonder and concern. With the help of her solitary neighbor, Gabriel Nash, Jo embarks on a quest to unveil the truth behind Ursa's enigmatic existence. They navigate a maze of unexplainable events and emotional discoveries, even as Ursa's obscure past looms. The summer's progression brings them closer to the fifth miracle, and signals the revelation of painful secrets that will decide their futures under the watchful stars.