CD 1: Episode: The Mysterious Chest
Hannah, Sofia, Sarah, and Lisa are best friends. They spend every free minute together at Hannah's parents' horse farm, caring for their beloved animals, without which they can no longer imagine their lives. One day, the girls discover an old wooden chest in one of the barns, containing mysterious documents, and they decide to uncover the secrets hidden within this find.

CD 2: Episode: Shadows from the Past
Hannah, Sofia, Lisa, and Sarah have found several maps in an old wooden chest, marking specific locations around the Lakeside horse farm. They are determined to uncover the mystery of these places and seek help from Arun Shah, a close friend of the girls. However, when they ask him for assistance, they are in for a surprise.

CD 3: Episode: Lakeside in Danger
Lisa, Hannah, Sofia, and Sarah overhear a conversation between Oliver Kramer and Mr. Michaels. The latter confronts Oliver with an old document stating that Lakeside was not founded by Oliver, but by his grandfather, and therefore actually belongs to him. The four girls do everything they can to shed light on the situation. Will they clarify the ownership and save the farm?.