The characters will be:
Tamarind (Sweet Tree?)
Tarragon (Little Dragon?)
and maybe Tamoka (River?)
Basically, they are going to be searching for and collecting heirloom seeds. Their goal: get them safely to the Norwegian-run seed depositary hidden deep in the Arctic. Their foes: Big Agri-Business. Maybe some ninjas... :)
So, I've got the idea down and it's time to start the writing...