Complex sentence: Mole, Rat, Badger and Toad will soon find that they must join forces, in a quest to save their homes from a sinister plot that could cost them their lives-and that could indeed bring about the destruction of the Willows itself.
Split into simpler sentences: Mole, Rat, Badger and Toad will soon find that they must join forces in a quest to save their homes from a sinister plot that could cost them their lives. A quest that could indeed bring about the destruction of the Willows itself.