Plot
One month after Andy Barclay was taken into custody and Chucky's third demise, in Lockport, New York, Tiffany Valentine, Chucky's ex-girlfriend and accomplice, bribes police officer Bob Bailey into selling her Chucky's remains. After murdering Bailey, she repairs the doll in her trailer and performs a voodoo ritual to revive him. Chucky later springs to life and kills Tiffany's goth admirer, Damien Baylock, much to her delight. Soon after, the couple get into an argument when Tiffany learns Chucky never wanted to marry her. Tiffany angrily locks Chucky in a playpen and taunts him by giving him a bride doll. Chucky later escapes and fatally electrocutes Tiffany before using a voodoo spell to transfer her soul into the bride doll in an act of vengeance.
Chucky explains that if they want to escape their doll bodies, they must retrieve a magical amulet called the Heart of Damballa that was buried with his human body. They decide the best bodies to inhabit are Tiffany's handsome neighbor Jesse Miller and his girlfriend Jade Kincaid. Tiffany calls and asks Jesse to drive the two dolls to Hackensack, New Jersey where Chucky's body is buried in exchange for a thousand dollars. Eager to marry Jade and needing money, Jesse accepts. Jade's strict uncle, police chief Warren Kincaid, tries to have Jesse arrested by planting a bag of marijuana in his van. Chucky and Tiffany seemingly kill him and hide his body in the van before he and Jade begin their trip, oblivious to the murder. The two are quickly pulled over by Officer Norton, one of Kincaid's cohorts, who finds the marijuana. When Norton returns to his patrol car to report it, Chucky ignites the car's gas tank, blowing it up and killing Norton.
Jesse and Jade flee and begin to suspect each other of killing Norton. Nevertheless, they marry. Kincaid briefly springs back to life, but Chucky finally kills him by stabbing him to death. While at a hotel, Jesse's wallet is stolen by another couple and Tiffany murders them in an act of petty revenge. Seeing this, Chucky realizes he's in love with Tiffany. He proposes marriage to her and they have sex. The following morning, Jesse and Jade's friend David arrives and joins their trip. David informs them that they are the prime suspects for the deaths, but he believes them innocent. After finding Warren's body however, David thoughtlessly becomes convinced they are both murderers and holds them at gunpoint. When Chucky and Tiffany finally reveal they're alive and threaten David with their own guns, a startled David gets himself hit by a truck, killing him.
Chucky and Tiffany steal an RV to evade the police. Jesse and Jade instigate a domestic dispute between Chucky and Tiffany to distract them. In the commotion, Jade kicks Tiffany into the RV's oven while Jesse pushes Chucky out the window. Eventually, Chucky is able to get the upper hand and acquires the amulet at his exhumed grave while also taking both Jesse and Jade hostage. As Chucky begins the ritual, Tiffany has a change of heart and decides she doesn't want to hurt Jesse and Jade. She attempts to kill Chucky, but he overpowers and stabs her to death. As he's distracted, Jesse knocks him into the grave. Private investigator Lt. Preston, who has been following the case, arrives and sees Chucky alive in the grave, shocking him. Jade steals his gun and empties it into Chucky, killing him.
After declaring the couple innocent, Preston sends them on their way. Tiffany springs briefly back to life and starts screaming, giving birth to a baby doll which attacks Preston.
