Seventeen-year-old Astrid Munn has always been invisible at school�until she starts hearing one name: Ethan Rivers. Alongside her unwilling curiosity, strange dreams begin to haunt her nights. In them, she witnesses a love story slowly unfolding�between Emma Winslowe and her best friend Astraeus, two people from different social standings.
When Astrid finally meets Ethan, something inside her recognizes him. Each dream of Emma and Astraeus begins to feel less like fantasy and more like memory. Then Ethan hands her a mysterious book called Astraeus, and her best friend points out the impossible truth: Emma Winslowe and Astraeus Wetherell�historic figures known as a writer and a painter�are the exact image of Astrid and Ethan.
Longing to escape the revelation and the strange electric current connecting her to Ethan, Astrid heads to Sunset Cove for summer vacation with her family� only to find Ethan�s family staying there too. With the weight of a promise made in another lifetime, she must decide�will she be brave enough to rewrite their ending, or let history repeat itself?