Until My Last Breath

When 16 year old Amethyst Wilson finds out her best friend, Erica, is dying from an unknown toxin, she desperately seeks an antidote. After days on end of extensive research done by her brother's ingenious best friend, Hunter, she figures out all of the ingredients she needs to make an antidote, but the ingredients are scattered throughout the United States. She and her 17 year old brother, Rex, run away with all of their savings and just two backpacks of their belongings. After they have embarked on their journey, they realize Hunter has joined them on their hunt by sneaking in the car. As they continue their adventure, Amethyst finds herself drawn to Hunter and more distracted from their quest.

Can Amethyst and her friends collect all of the ingredients and make the antidote before it's too late?