The Problem With Incomplete Circles

There's a reason I don't attach all the sides on triangles. Triangles are complete, 3-sided figures connected and hard to unconnect. That's what my life was; until The Accident happened, and I was thrown into a horrible reality. The society in which I've lived my whole life is hiding something: everything.
Now it's not Mom, Dad, and Castine anymore. It's Castine, the truth of secrets, and lots of incomplete triangles; and it's my job to complete them.