12-year-old Natalie is furious when her mum, Ffion, loses her factory job for sticking up for workers' rights. Now they have to leave their home and go to stay at her uncle's farm. The last thing Natty wants is to buddy up with her know-it-all cousin, Nerys. Natty gets on better with her older cousin Huw, despite the fact that he's returned from the front line of WWI and his mood can be unpredictable. Instead, Natty finds herself making friends with two convalescing soldiers with very different conditions. Maybe spending time with them will give her a way to help Huw? One of the soldiers, Johnny, is suffering with amnesia and Natty is determined to help him discover his identity. Before she knows it, Natty is drawn into a mystery where the answers to who Johnny truly is lay closer to home than she imagined.