Steve's crew battles a fiery wreck in the heart of Toronto; the OPP takes to the air to keep the roads safe; when freezing rain ices up the highway around London, a newly-promoted rotator operator gets his first big test.

A 70-vehicle whiteout crash shuts down Highway 400 and the OPP jumps to organize an army of recovery crews; the Sarnia team struggles to recover a severely damaged trailer without losing the load.