Tana and Trigger escaped from the prestigious Pioneer School, but they left someone behind--the one person who helped them slip away from a twisted security chief and a promise that, once made, would have to be kept for a lifetime. The two young pilots thought they could fly away and duck their commitments. They were wrong. An unresolved past is guaranteed to become the present. Back home at National High School, the double-or-nothing best friends are faced with other challenges: A meteorology class, a pending midterm project and an eccentric professor with an itch to chase storms of epic proportions. During a research field trip, Tana and Trigger are caught in the grips of a fierce F1 tornado and, when their storm chasing rover is destroyed, they seek refuge in a retention ditch. Buried beneath the Oklahoma dirt, Tana receives a cryptic SOS message from the friend they abandoned. But is it real or a fractured PTSD vision? When the storm clears, the memory remains, making her believe the virtual plea for help wasn't a post-traumatic hallucination. Guilt-ridden, Tana and Trigger return to the place they vowed never to revisit--to save a friend, repay a debt, and confront the man that killed Tana's