The Island of Destiny

"Sabrina! Sabrina!" You walk deeper into the jungle, retracing your footsteps. You hear a distant crack of lightning. You grow worried. Its easy to follow her shoes footprints stamped in the dirt. She was coming towards you when she vanished. Suddenly you stumbled across a new set of tracks. Boot tracks. Its unnerving; you must be imagining things. Sure enough, even after you rubbed your eyes, they were still there. Sabrina's footprints stopped dead where these tracks started. What should you do?