Timely Relationships: A New Beginning - Timely Relationships, #1

Bob and Mary, scientists living on an island in the year 2220, are working hard to find some way to escape. The earth is deteriorating from overpopulation. Rampant violence and crime plague the planet. There are not enough police to make any difference. Every person is scrambling for a place to live. Land and dwellings are at a premium.  Their efforts rewarded them with the discovery of time travel.
With the portal they invented, they can travel back 200 years to the year 2020, where their island is uninhabited and uncharted.  They now have a new beginning.