Keepers of the Sapphire

Poor Topaz just wants an ordinary life with her to best friends, Mark and Stacy. But suddenly her life is turned upside down when her parents are reported missing, and she's shipped off to Bermuda with her friends and an odd dog. Then she finds out her pals are really aliens with powers destined to protect her. On top of that an evil pricipal is chasing them, and they travel to the future. Could things get any worse?