A girl, while running away from an orphanage, frees a black horse. She is later rescued by a black horse after washing up ashore. Takes place early in the 20th century in southern Australia.
Bella finds herself being cared for at Dr. Austin's farm, but has no memory of who she is or where she comes from. All she knows is that Black Beauty is hers.
Ted practices for the local Gymkhana competition.
Bella and Beauty run away. With a storm approaching, they must search for shelter.
Bella is accused of stealing Black Beauty.
Frank prints Bella's story in his paper. Ted's horse is injured.
Bella convinces Dr. Austin to let her sit for the Willstown Grammar School entrance tests along Ted. Meanwhile, Weeks has come up with a new ploy.
Dr. Austin receives a letter that demands Bella be returned to the orphanage.
The matron of the orphanage comes to take Bella back.
The newly-minted detectives arrange their first meeting.
Frank and Bella go to Willstown to investigate the Astoria.
Bella is arrested after sneaking onto a boat in an effort to learn more about what happened to the Astoria.
Bella accompanies Mrs. Mac in order to take care of an ailing woman the night before her custody case.
Despite being under strict instructions to behave herself, Bella allows herself to be goaded into a race.
Frank inadvertently causes a gold rush in Yarrandilly.
The children find an injured kangaroo and try to care for it. A woman arrives at the Austin residence.
Bella recovers her memories.
Bella is confused about the decision she has to make about going to England with her Aunt Caroline.
Ted has narrowed down the location of the gold, but the gang need a seaworthy boat. Fortunately, Ted knows where they can find one.
Potch and Weeks ransack the stables in the hopes of finding the gold.
The children finally get the box opened, but are surprised by the contents.
The children hatch a plan to keep Aunt Caroline in Yarrandilly.
With Beauty's life at stake, Bella must make a difficult choice.
Bella meets with Weeks to get Beauty back.
Weeks makes another try to get the gold, and it's up to Bella and Beauty to stop him.
Bella and Caroline return from holiday in preparation for the wedding.