The high-school student James "Jim" Majelewski is a troublemaker bad boy, playing prank at school. The Principal summons his parents and explains that Jim will be suspended and will not graduate, unless he goes to the Psychological Research Institute (PRI) to be submitted to a treatment by the famous Dr. Anthony Blakely. Their parents are forced to send Jim to the PRI and the nurse Vivian welcomes him. Dr. Blakely connects Jim to a huge brain and he has dreadful hallucinations. He flees from the PRI and meets his girlfriend Janet and his best friends Willie and Becky at the dinner where they work. However, Dr. Blakely's assistant Verna arrives and abducts Jim back to the institute. Soon he discovers the true intention of Dr. Blakely and his brain.
—Claudio Carvalho, Rio de Janeiro, Brazil