The Diving Bell Vs. The Butter-Glider.The Monarch and Dr Mrs The Monarch celebrate a recently released from prisons King Gorilla's birthday. When Dr. Venture is suddenly paralyzed, and with the Ventures' submarine missing, they go to SPHINX to use their submarine to go on a Fantastic Voyage style trip into Rusty's body to find the source of the problem, forcing SPHINX to join in because the boys' long-term memories are being affected by the constant brainwashing every time they find SPHINX headquarters again. Inside Venture, Brock, Shore Leave, Hank, and Dean discover a clot formed by the X-3, Venture's submarine, with the corpses of the seventh Hank and Dean at its helm. Brock and the boys take the X-3, while Shore Leave heads back out. Elsewhere, the Monarch has become overly attached to his "Butter-Glider", a new butterfly-themed personal flying device, leading 21 to go on an unofficial attack on the Venture compound, with only Hatred to stop them. With Hatred subdued, the Monarch joins them and lords over the still unconscious Venture, who, thanks to the X-3 within him, attacks the Monarch. The Monarch takes Venture outside when Hatred uses the shrink ray on them, making Venture a giant. Venture's weight proves too much for the Butter-Glider to carry and the body and glider crash to earth. A stunned Monarch sits next to his smashed glider, wondering what happened. Above him, the S.P.H.I.N.X. submersible (now full-size) teeters at the edge of Dr. Venture's eye. It falls off Venture's face and onto a stunned Monarch. Afterward, with Venture back at his normal size, Brock, Hank, and Dean are still trapped in Dr. Venture's body.