Existing Ring Protect Plus plan with Verizon

I currently have multiple ring cameras with the Ring Protect Plus plan. I am wanting to add the ring alarm system but it is my understanding that I have to purchase this from Verizon and get their Security by Ring plan. Will I be able to move my cameras from the Ring Protect Plus plan over to Verizon's Security by Ring so I only need to pay for one plan? Or will I need to pay for both plans? If everything can be part of the Verizon Security by Ring plan, does everything still work using the existing Ring apps? Thanks.