Nowan and Frie Bosmuis are the best buddies. The two are enjoying themselves and looking forward to the annual Sun Festival with excitement. Nowan is picking a poisonous mushroom for the porridge of his little sisters! Only the bottled berry tea from overopa Apodemus can still save them. But grandpa lives far away and the journey to his stone mill ruin is full of dangers. Nowan promises to make up his mistake and decides to get the tea …