Twins, George and Katie, live happily in a delightful old cottage with their grandparents Mr. and Mrs. Hedgrow.
When their beloved granny dies, the twins are left with only their elderly grandfather to care for them. Unfortunately, Grandpa is not all that strong himself, the twins are worried as well as heartbroken.
But a new life opens for them when they discover a colony of fairies living secretly in the wilderness at the bottom of the garden.
Mr. and Mrs. Hedgrow are two of the few humans that the fairies trusted.
They loved the old couple and were sad to lose Mrs. Hedgrow.
The fairies are taken with the children and allow themselves to be seen.
They introduce the children to new and exciting ideas and adventures.