Alice and Plum are two mischievous little otter sisters. One day in a field with daisies as tall as umbrellas, they find a large shiny wrapper left behind by humans with a huge cookie crumb inside. The smell is irresistible. Plum swallows it in one gulp. But almost immediately, she becomes very sick.

Determined to fi nd a cure for her sister, Alice sets out on an expedition to a monastery at the other end of the forest. Unknown adventures await, as well as an encounter with someone who seems giant compared to the tiny otter..