Kamen Rider Heisei Part 1: Kuuga and Agito

From the introduction: It is the year 1999. This is a world on the precipice of a new millennium, but with the hopes of the near future came the dredges of the past. Struggles and bloodshed that find their roots in mankind’s infancy will blossom in this time of change, but so too will those who can find the strength to stand against the darkness and fight on.