The Dark Forest is part of a near-future trilogy that presents the first opportunity for English-speaking readers to delve into the multiple-award-winning universe created by China's most beloved science fiction author, Cixin Liu. In this installment, Earth is on edge with the disclosure of an impending alien invasion set four centuries in the future.

The defeat of the aliens' human allies is overshadowed by the fact that sophons—subatomic particles used by Trisolaris—grant them instant access to all human information, leaving Earth's defense strategies utterly transparent to the enemy. The human mind, however, remains an enigma, concealed from the aliens. This secrecy is the driving force behind the Wallfacer Project, an audacious initiative that empowers four individuals with vast resources to devise covert strategies, concealed through trickery from both Earth and Trisolaris.

Among the Wallfacers are three prominent statesmen and scientists, but the fourth is a mystery. Luo Ji, a modest Chinese astronomer and sociologist, is puzzled by his newfound prominence. His only certainty is that he is the Wallfacer marked for death by Trisolaris.