Plot plops into my lap

This morning the plot for my NaNoWriMo project plopped into my lap. Actually, it plopped into my head sometime during the night and I was able to get it transcribed into an outline form in the computer this morning.

I had been worrying over the thing for some time. It seemed obvious that I should figure out a way to set a mystery or thriller on a houseboat on Lake Roosevelt (where I vacationed this year). But I could not come up with a satisfactory angle on it. What would be the mystery? Would someone get killed? Why would that involve six or so middle-income empty-nesters on vacation? Wouldn't they just leave it to the police?

The answer came: they don't find trouble, trouble finds them - and won't leave. So the basic plot seems to be that the houseboat gets hijacked. The exact when and how and how it gets un-hijacked still need to be worked out. I have one sequence outlined, but it needs more work. But it's a start. I'm further along than I was when I did this last year. At least it feels like I am.