Inspire by Ressha Sentai Toqger.
The Shadow Railroad line has return after being imprison for thousands of years & plotting their revenge against the wonder city. A family-owned business: the railroad rainbow line, their father has disappeared when he has his children prepare to fight against the shadow monsters to become: Power Rangers!
As Andrea got kidnapped by the Chain Shadow Monster, the power rangers are racing to rescue the hostages as Helen is having flashbacks about her & Andrea and how they end up getting adopted by Andrew Marshall.