Jim Lake's sister, Y/n Lake, is the family fighter and protector. Them and their friend, Toby Domzalski, discover that their is a world living beneath their feet. It is Jim's job to protect troll and mankind from the GummGumms. But, there are TWO Trollhunters?! What will happen in this little adventure of theirs? Will a certain troll take a liking to her? (Disclaimer) The cover is not mine, I found it on Google, and I don't own Trollhunters.