Masyu (Single Liar) (375)

Draw a single loop that passes orthogonally through centers of cells. The loop must go through all circled cells. The loop may not intersect itself or enter the same cell more than once. The loop must go straight through the cells with white circles, with a turn in at least one of the cells immediately before or after each white circle. The loop must make a turn in all the black circles, but must go straight in both cells immediately before and after each black circle.
One circle is the wrong color (black instead of white, or white instead of black). Which one is for you to determine.

Reference: WPF (1)