Deep in the underwater city of Bikini Bottom, Mr. Krabs is thrilled to grand-open his second restaurant, the Krusty Krab 2. However, disaster strikes when Plankton, desperate as always to steal the secret Krabby Patty formula, attempts a chaotic sabotage. Meanwhile, King Poseidon of the lost city of Atlantic City is suffering from a vanity crisis because his facial skin is excessively dry and aging. Prophesied by his wise Chancellor, Poseidon learns that the tears of a sea snail provide the ultimate moisturizing cure.Far away in Bikini Bottom,
SpongeBob SquarePants adores his beloved pet sea snail, Gary. Driven by pure spite and jealousy over Plankton's failed scheme, the villain decides to ruthlessly frame SpongeBob by kidnapping Gary and shipping him all the way to Atlantic City. Heartbroken and fiercely determined, SpongeBob refuses to accept the loss of his best friend. Alongside his loyal, skeptical best buddy Patrick Star, SpongeBob abandons his fry cook duties and embarks on a treacherous, cross-ocean road trip to rescue Gary before Poseidon uses the snail’s tears to save his royal skin, which would unfortunately require draining Gary to death.During their epic journey through desolate wastelands, the duo encounters bizarre hazards. They stumble into a ghostly, mystical gambling saloon where they meet a tumbleweed sage named Otto, voiced by Keanu Reeves. Otto grants them wise, surreal advice and transports them in a magical ghost train. Along the way, flashbacks reveal the poignant, tear-jerking origin of how a young SpongeBob first met baby Gary at Camp Coral, proving the profound depth of their lifelong bond.Eventually, SpongeBob and Patrick arrive in the dazzling, hedonistic playground of Atlantic City. They sneak into the royal palace just as Poseidon is preparing to harvest Gary’s tears. Unafraid, SpongeBob confronts the tyrannical monarch, delivering an impassioned speech about the irreplaceable value of true friendship and
unconditional love. Inspired by this touching display of loyalty, the citizens of Atlantic City rise up, reminding Poseidon that inner beauty and genuine connection matter far more than superficial youth. Poseidon relents, freeing Gary and returning him to a joyous SpongeBob. Reunited, the heroes bid farewell to their wild adventures and happily return to Bikini Bottom, where Plankton faces his usual comedic defeat and life resumes its cheerful, absorbent rhythm.