Thomas is a friend to all plants. He even has a cactus collection! One morning, he discovers his mother has been replaced by a fern -- a monstrous fern! What happened? Is this the start of a plant revolt? Did the fern eat her? Where did this fern come from, anyway? Will it eat his father too? And then Thomas? That Night, A Monster . . . is a beautifully painted all-ages graphic novel exploring imagination: its power and its dark side.