The Turtles finally have collected all of Master Splinter's data-bits. Donnie uses the cyber-portal to return their master from the digital world back to the physical world, just in time for April and Casey's wedding. They immediately head to Casey's grandmother's farm, where the wedding will be hosted, with Raph acting as the best man and Mikey as the maid of honor. In addition, all the Turtles' friends show up as invited guests, including Casey's mother and cousin Sid, Angel, the Professor, Usagi and Gen, the Ninja Tribunal, the Acolytes, the Utroms, Leatherhead, Karai and Dr. Chaplin.
Unfortunately, there are some uninvited guests which Splinter found while searching for April: the Foot and the Cyber Shredder. Cyber Shredder had modified a line of code in Splinter's data bits to be brought into the physical world with Splinter, allowing him to reconstitute himself by copying the same process the Turtles used to restore Splinter. Immediately, a brawl breaks out between all attendants. The Shredder kicks the Turtles out of the barn, then orders all his troops out while he slashes the supports of the barn roof, causing the building to collapse on everyone else, much of the Turtles' shock. However, Hisomi and Leatherhead are able to hold up the debris, and everyone makes their escape outside and continues the fight, which is soon joined - and finished in short order - by the Justice Force.
In the meantime, Donnie searches for the homing device in Splinter's ear, determining that since the Shredder is made from Viral's properties, he can be destroyed by the decompiler. However, the Shredder puts up a force field that can't be penetrated by the decompiler beam. Splinter penetrates the field, combats the Shredder and disables his shield generator, enabling Donatello and Serling to obliterate him. The wedding resumes by the lake side, and to the joy of all Casey and April are finally married, with the Rat King, Renet, Bishop, Cody, and the Daimyo and his son watching the ceremony as secret sideline spectators.