The arrowhead was the key to everything.Wild Flower watched, unable to do anything, as the lone archer let loose and the flint arrow flashed in the sunlight as it bore down on her father.Some 6,000 years later, Henry was suffering from slightly less pressing problems. Dragged out to visit his Granddad yet again, he decides to break open the case glass containing the old archaeological finds. He reaches out to touch a pure white flint arrowhead with a black lightning strike running down its heart. In a heartbeat, their realms collide as he finds himself sent back to Wild Flower's world. He checks his phone but there is no signal here.Together, and without even speaking each other's language, Henry and Wild Flower must then learn to trust each other as they travel through a land of forest, tombs, wild threats and an enemy, with the power of the Wolf, who seems unstoppable. She must protect her family while he wants to get home. Along the way, they might just surprise themselves and everyone else for that matter.