Professor Ericson, an expert in gravity, has invited Dr. Quest to visit him at his home, Raclef Castle in Norway. There, he will demonstrate a spectacular achievement: the Ericon Bar, an anti-gravity device!
Sinister forces are at work to steal the device and the notes that describe it: Ivar is the mastermind, and Dietrich Sorensen is his henchman. Dietrich is disguised as one of the gargoyles that adorn the castle parapets. Using his acrobatic skills, he can come and go as he pleases from that perch.
After the demonstration, when everyone is asleep, Dietrich enters the house. Race surprises him, and he can't get the plans from the wall safe. But he can get the bar, which he takes to Ivar. Instead of paying him, Ivar orders him back to his perch. Dietrich is not happy about this, and promises Ivar "he'll be sorry". But it's Dietrich who is soon sorry.
Ivar escapes to the fjords with the bar (stealing Dr. Quest's boat). Dr. Quest pursues in a helicopter, and sees the submarine
O Dr. Quest, Jonny, Roger, Hadji e Bandit navegam acima de um fiorde, onde se apoia uma geleira enorme, para visitar o professor Erikson no castelo de Raklev. Erikson, um cientista famoso, tem trabalhado em uma fórmula para inverter a gravidade. Ivar, líder de um grupo dos ladrões que querem a posse da fórmula aparece.Um anão, empregado por Ivar, se disfarça como um gargoyle e substituí o original na torre O anão rouba a barra. Quando exige seu pagamento, Ivar dispara contra ele.Quest e Roger seguem em um helicóptero. Sven, um membro do grupo de Emil, tenta acertar o helicóptero com tiros de rifle. Os disparos do rifle quebram a geleira, enterrando Ivar e o submarino.
El Dr. Quest visita al castillo de un compañero científico noruego, y debe ayudarlo a proteger el su último invento, un generador antigravedad, que un ladrón intenta robar disfrazado como una las siete gárgolas que hay en el techo.
Коллега доктора Квеста — профессор Экрисон создал прибор позволяющий «отключить силу тяжести», и с этого момента его жизнь подвергается опасности, поскольку смотритель частного кладбища, расположенного рядом с замком изобретателя намерен украсть аппарат, для чего нанимает карлика-акробата. Семья Квестов, как раз прибывает про приглашению норвежского учёного.
