After the suspicious suicide of his older brother Gaeul, Haneul decides enrol at Gaeul's school and enter the Silent Reading Club, in which his brother was an active member, to uncover the circumstances that lead him to his tragic end. But is brotherly affection and filial piety the only reason Haneul is going this far? A story where every character, including the protagonist, hides a wealth of secrets that intertwine to create an impenetrable darkness which threatens to swallow them all...