Instead of a fresh start, high school provides more grief and isolation to Echo, whose older sister died a year earlier, but insights gained from Zoe's diary--a fifteenth birthday gift from Zoe's boyfriend--about her sister's life and death change Echo in ways she could have never expected.

Crystal must choose between her dream of becoming the first college student in her family, or keeping a promise to her twin sister, Amber, to raise together the baby one had in high school.