The seventh season of Teenage Mutant Ninja Turtles chronologically begins where Episode 142 left off.
The Turtles take a tour of Venice, Italy, just in time for the annual Mardi Gras festival, which April O'Neil is covering for Channel 6.
Meanwhile, Shredder and the mutants will use Krang's new heat ray magnifier to burn the city to ashes using the power of the Sun unless the Turtles can stop them.
The Turtles and Splinter must stop Shredder and the Black Heart Gang from stealing secret maps of nuclear missile sites.
After bringing the Technodrome back to the surface, Shredder and Krang trap the Turtles and send them to Dimension X where they become slaves.