Fresh off the heels of King Midnight's rat-army invasion at the Winterberry Ball, Delphine, Alexander, and Cornichonne are on the run, making their way through the far reaches of Peltinore. Unlikely allies pop up at every turn, but so do new enemies. While evading the rats hot on their tails, the trio uncovers new clues about the legendary Threaded tailor mice, including surprising discoveries about Delphine's magical needle. And as Delphine's powers grow stronger, she realizes she may need to head straight into Midnight's lair and confront the villain herself. Will Delphine solve the mystery of Threaded and save the kingdom from the nefarious rat king before it's too late?