After an unforeseen incident, Madeline Carter is forced by her family to leave her home city, San Diego, to seek a "better life". Maddy left everything behind, including her closest friends Jessie and William, without a single word. After several months of search and denial, the two siblings come to accept the fact that she's gone and move forward with their lives. When Maddy appears at their door four years later, neither of them were prepared for what she had in store.