Matthew Graham and Ashley Pharoah will write every episode of Eternal Law, which focuses on two angels called Zak and Tom who are sent to earth to help a community and try to understand humanity.
The show is set in York and follows Zak and Tom as they work as lawyers and try to persuade people to treat others well. However, the pair struggle to follow through with their plans because of their enemy, dark angel Richard Pembroke.
Meanwhile, Zak is recovering from falling in love with a human called Hannah the last time he was on Earth. The relationship is against angelic law but Zak soon discovers that Hannah is now working for Richard.
The six-part series will be produced by Kudos, the production company behind shows including Spooks, Hustle and Law & Order: UK.
Pharoah said: "This idea has been a passion of ours for some years now and we always thought its natural home was ITV. To make it with our friends and partners at Kudos just makes it that much more exciting."
Filming for Eternal Law will begin in February and the show is expected to air next year.