After a young and mysterious girl named Lightning dies suddenly, her closest friends each get a stack of letters from her. As they write letters to their dead best friend, they slowly start to read the letters from Lightning. No one knows how or why Lighting died, but when they find out, can they handle the truth? Or will it break them apart and make them turn on each other?

This is the sequel (continuation) of After. Hardin and Tessa's relationship will be tested in ways she never expected, but he knew of all along.