No need to fret! If you missed dialogue or forgot an important detail, you can always access the handy-dandy story tab of the plot hubpage to review previous scenes or chapters.
If you are still having trouble figuring out where to go next, check the plot hubpage! Characters and hints there might help point you in the right direction. Dialogue will often appear on the hubpage, but sometimes you might need to travel somewhere specific in Neopia first before it starts!