''Eureka'' is a drama set mainly in rural Kyushu, Japan, and is almost entirely shot in sepia tone. It tells the story of the lasting effects of a violent experience on three people, a teenage brother and sister, Naoki and Kozue Tamura and a bus driver, Makoto Sawai. These three are the sole survivors after the bus is hijacked by a gunman. The actual violent events which traumatise them are not shown in detail. The extent to which the three have been affected slowly becomes apparent. Naoki and Kozue do not return to school, do not speak and become dissociated from their parents. Some time after the hijack, their mother abandons the family. Later their father is killed in a car crash. It is not clear whether his death is suicide. The two children continue to live alone in the family home. Meanwhile, Makoto is finding it impossible to carry on normal life and takes to the road, leaving his estranged wife living in the family home with his elderly father, elder brother, his wife and their daughter. After some time, Makoto returns home to find that his wife has left him. He cannot return to driving a bus and takes a job as a day-labourer with an old school-friend.