In 1959, a young man, Mark, discovers that his house has a portal through the basement which takes him to 2017, There he meets Mary Beth, a young woman on holiday with her sister and staying at the same house. Eventually, Mark and his brother meet Mary Beth and her sister and a double romance ensues. When they go together back to 1959 their activities come under the notice of a nefarious gang and over time, the girls realise that they are under threat. Also the girls know that they can't stay in the past forever, while the boys know that they can't abandon their mother. Could heart ache be in all of their futures?