Haiba Sumio is a student at a Tokyo High School with a special ability; he occasionally falls asleep and wakes up with premonitions of the future written out on his "Dream Diary".

With this ability, Sumio helps out people in trouble before anything bad happens, until one day when his peaceful life completely changes.

Written and illustrated by Kenji Sakaki [ja], Enigma was serialized in Shueisha's shōnen manga magazine Weekly Shōnen Jump magazine from September 13, 2010,[2] to October 31, 2011;[3] its last chapter was published in Jump Next!

[4] Shueisha collected its 56 chapters in seven tankōbon volumes released from December 29, 2010,[5] to February 3, 2012.

[6] The third, fourth, fifth, and seven volumes debuted on Oricon's weekly manga chart.