White has one eye in the right half. is the point to falsify the left eye. White doesn't have to resist with , but nothing else works for her either. at fails because Black can capture at a. Now b and c are miai for the kill.
Notice how the 's cause the circled point to become a false eye.
This is a classic example of the eye stealing tesuji.
here is met by , securing the left eye - just be careful, at a is a blunder. Other tries all fail: at b or are immediately captured.