Cyrus and Antigone Smith live in an old roadside motel with their older brother Daniel. Their father died, and their mother does not regain consciousness in the hospital. Their life has long turned into a series of routine chores, school lessons and Sunday trips to see their mother. But one day a strange old man with bone tattoos appears at the motel. Not even 24 hours go by and the old man is dead, the motel has been burned to the ground, and Daniel is missing. And now Cyrus and Antigone have to find the mysterious Order and undergo serious trials in order to rescue Daniel from the hands of the villains, and at the same time learn unexpected details from the lives of their parents.