Everyone remembers the day the girls went missing. May Day 1912, a day that haunts Missensham. The day two girls disappeared. The day the girls were murdered. Iris Caldwell and Nell Ryland were never meant to be friends. From two very different backgrounds, one the heir to the Caldwell estate, the other a humble vicar's daughter. Both have their secrets, both have their pasts, but they each find solace with one another and soon their futures become irrevocably intertwined. Now, many years later, old footage has emerged which shows that Iris Caldwell may not have died on that spring morning. The village must work out what happened the day the girls went missing...