The summer shoreline looked peaceful.
Families relaxed along the water.
Boats drifted in the distance.
Nothing suggested that within minutes, a life-or-death emergency would unfold in front of dozens of people.
Then a kayak overturned.
A 40-year-old man named Christopher Robertson found himself struggling in the waters of Georgian Bay.
For a brief moment, witnesses could still see him.
Then he disappeared.
