Valacor is a demon that escapes from hell and possesses the corpse of a local pastor named Ron after killing him. This demon uses the pastor's body to commit murders and feed on electric power, causing power surges in the area. Valacor is the first demon that Hub is assigned to hunt down in the series.

Hub and Kitty track Valacor by following reports of power outages and electrical surges, deducing that the demon feeds on electricity. They locate Valacor at a power station where the possessed pastor is climbing the walls. They attempt to capture him using a bear trap and firearms. Ultimately, Hub smashes Valacor's head with an electrical panel, causing flames that consume the demon's body and the surrounding building.

Hub and Kitty share a mother-son bonding experience while hunting Valacor. Kitty is upset about the demon case involving her church and pastor and insists on assisting Hub. She also expresses feelings of having let Hub down as a mother due to his past sin that sent him to hell. Hub is initially reluctant to explain his 'mistake' but accepts her help, which proves crucial in their confrontation with Valacor.

During the encounter, Hub's flashlight bulb bursts, and Valacor physically attacks him, flinging him against a wall. Kitty sets a bear trap that Valacor steps on, but the demon is resistant to tranquilizer darts. Hub fires multiple shots, but Valacor counters by knocking Hub down with a bin. The fight culminates with Kitty shooting Valacor with a shotgun, and Hub smashing his head with an electrical panel, leading to the demon's destruction by fire.

Meanwhile, Lucky discovers the bodies of the Earl brothers, victims of Valacor's violence, and finds Tater locked in a car trunk. Lucky blames Hub for the deaths. The episode also includes ongoing tension and investigation between Lucky and Hub, as well as Hub's attempts to reconcile with family members Maryanne and Cade.