Inthespringof1986,thereisanexplosioninChernobylandagirlcalledMimiarrivesinasmallvillageinWesternFinland.Sheimmediatelyfills15-year-oldMariia’slifewithradiatinglight.20yearslaterMariiareturnshometotakecareofhersickmother,andmemoriesofthatmeaningfulsummerstartrisingtothesurface.