After Poppy's husband dies from pneumonia and she is accidentally carried away by a bat, Ereth, a porcupine, starts planning her funeral service, but Spruce--Poppy's grandson--does not believe Poppy to be dead, and goes off to search for her.
Spike is just learning about his new quills from his friend Rupert, but when Rupert gets in trouble with Bear, Spike must use his imagination and his own quills to save him.
Hamlet, a pig with a vision, determines to build the biggest sandcastle in the world. His porcupine friend Quince is his reluctant partner who worries that things will go wrong, and sure enough, when the tide comes in it brings trouble.