Maxperson
Morkus from Orkus
Sure you can. A plot is like a battle strategy. It only lasts intact until contact with the enemy. Breaking the plot doesn't mean abandoning it completely. It just means the DM has to flow with the agency displayed by the player and adapt the adventure to react to player decisions, not force the plot to remain as the DM wrote downBut the core problem is that a novel is plotted. You can't have a plot AND have agency to break the plot. You can maybe have side adventures that are unrelated to the plot, or maybe you can encounter aspects of the plot in a differing order.