What is the summary of how the hyena got caught in the book tightrope by gillan cross?

In the book "Tightrope" by Gillian Cross, the hyena gets caught when the protagonist, Ashley, and her friend end up trapping it inside a shed while trying to escape from the anger of a local thief who they have anger by stealing and accidentally destroying his belongings in the woods. The hyena becomes a symbol of danger and chaos in their attempts to survive and make amends for their actions.