Sometimes doing your duty can be the hardest thing of all...

Seventeen-year-old Alia finds herself mysteriously drawn to the new kid at school, Zac, and she knows it isn't just because of his sporting prowness and good looks - their connection is deeper and freakier.

What with the death of her dad, and a terrifying stalker watching her house, life is pretty tough. Then one night, everything changes again as a phone call sends her fleeing for her life.

Alia discovers she is part of the Time Guardian family, a legacy from her father. Now she has turned seventeen, it is time to take on family duties. But she won't be the only one - there are always four at any time.

The family is gathering, which can only mean one thing - the end of a cycle of time,a nd teh latest generation of Time Guardians must prepare to reset the Clock of Deep Time.

But someone else has discovered the family secrets... Mars Petersen, leader of apocalypse cult, Avera Moon, is determined to use the Time Guardians in his own plans.