State Route 684 departs Harrisonville and enters into a more rural setting that features a blend of woods, meadows and houses abutting the highway. The route bends to the north and then northwest, as it passes through its intersection with Vance Road. Continuing to the northwest, State Route 684 traverses a more heavily wooded area, and curves to the north prior to meeting King Ridge Road.
State Route 684 begins in Harrisonville and enters a more rural setting that combines woods, meadows, and houses alongside the highway. As it heads north and then northwest, the route intersects with Vance Road. Further on, State Route 684 passes through a wooded area before curving north to meet King Ridge Road.