A strange letter turns 15-year-old Sophia’s life upside down: Her father, who allegedly lived abroad, was actually managing a stud farm on the island of Rügen and has now bequeathed it to Sophia.
After a visit to Eastern Light Stud Farm, an encounter with her grandfather and a magical moment with a special mare named Soona, one thing becomes clear: Sophia wants to stay at Eastern Light. A wonderful time with Soona begins, and Sophia falls in love for the first time. But why does her mother try to keep her from doing everything that makes Sophia happy? After an argument with her mother, Sophia takes Soona out for a ride. They end up taking a fall during a storm. Sophia is seriously injured, and it seems she will end up losing both the stud farm and Soona and Tom. But then a big secret, in which her mother plays an important role, comes to light, and the tide turns.