Crystal Runners

This story is about a girl named Jaelah and his brother Ayden.  It started of when their father went crystal running and came back with crystal flashback and the crystals he got had no light in them. So they went to the crystal running site and found out that the lifeline of the Earth was dying.  Suddenly there was an earthquake and Jaelah and Ayden fell back and it suddenly stopped.  Jaelah was sad and angry because if they had no crystals when they came back they might get kicked out of the village.  So Jaelah went off by herself to go further into the caves and found a new lifeline.   Jaelah called Ayden over to tap the lifeline and this led them to finding the prince of the surface dwellers.  Because they lived underground they headed up to the surface and returned the prince. Then they found out all the lifelines did not connect to each other and the Earth will shake itself apart and it will die.  Then they met their grandfather who told them that they needed to head towards the Fire Mountain where dragons lived. So they got past the dragons and headed down a cave where their ancestors lived and found she had the royal bloodline and could save the world by restoring the broken crystals that could protect the world from shaking apart. She saved the world and that's the end.