While deep in meditation, Splinter is contacted telepathically by his sensei, Master Mogo-San who requests that Splinter meet him at Pier 17, where he will be arriving later that same day. Splinter dutifully agrees. Meanwhile, across town, the notorious Black Heart ninja gang, led by a young man named Yoku, has been robbing The City's banks and garnering the attention of Shredder and Krang, who want to put the Black Heart gang to work for them.
At Pier 17, Mogo-San arrives and is surprised to find Hamato Yoshi is now a rat. Splinter promises to explain it all, but first he wants to know what brings his sensei to America.
Mogo-San explains that he has arrived to pass on the sacred white belt of the Mogo clan to his grandson Yoku and that he needs Splinter help in locating him. This Yoku fellow was once a student of Splinter's and is the same Yoku who leads the infamous Black Heart gang.
Splinter takes Mogo-San back to the sewer-lair and introduces him to the Turtles, who are most eag
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