Playing card-themed quartet made up of Blademan the Swordsman, Thud the All-Powerful, Arrowman the Archer, and Snapper the Camera Whiz. They are modeled on The Three Musketeers. The four can merge together while transforming into their powered forms. Cardian-Con looks similar to a jester-like grim reaper. Cardian-Master, on the other hand, is a knight equipped with a sword and shield. Found in the year 2000 in Tokyo.    from wikipedia

It is the 25th century. The dark lord has 'infected' history with time-devices that could damage history beyond repair. Flint and his father lived in the prehistorics when they got turned into fossils. They are discovered and Flint gets turned back to his original state. With the help of his father, a boy Tony and a girl Sara he has to travel through time to bring the time-devices back to the land of time so history will be saved.
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(Source: Anime News Network)

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