Seeing that you have done barely anything to sow crops in your fields for the past many seasons, an angry mob ravages and plunders the farm of everything, telling you that surely they can put things to better use.
You lose all crops, tools, livestock and buildings!
When this event occurs, player will lose all investments including crops, livestock, tools, and buildings, but not projects. The players savings are not lost.
The Angry Mob event only occurs if a player neglects his fields and sows nothing for many seasons in a row, so a surefire way to prevent it from ever occurring is to sow a few crops at least every few years or so.