Following the events of Son of Beast, Joshua Hall and the Beast work with other characters across MHHM films to stop Jonathan Scar's master plan, a plan set in motion by a man named The Magician. He seeks to collect the pillars of power, five ancient items that grant its user limitless ability, in order to conquer the universe.

After the devastating effects of Beast: The Omen, the world is in ruin. The Magician has just collected the pillars of power and harnessed them to kill half of all life, leaving Josh, Roonald, and The Beast stranded in the cursed forest. Those who remain of the MHHM characters band together in hopes of defeating The Magician once and for all, no matter what sacrifices must be made.

Vlogger Johmimy Johnson and his strange paparazzi Roonald McDoonald stumble upon Hailey O'Connor and Rylee Harrington and promptly get invited to their party. After this, the four became best friends known as the Comedy Kids.

Two kids, following the death of their older sisters, seek to avenge them by killing a half-man, half-gorilla monster who they believe to be the killer.

Video game characters from all across the universe battle in this tournament as enemies, eventually agreeing to band together against a greater threat: a character whom the creators attempted to wipe from the game completely, a man called The Magician.

The four Comedy Kids decide to have some fun and go to the beach, but they all end up gruesomely dying.