Plot

Cat and Gene, long divorced, come together to visit their son and grandchildren, Sydney and Willie. The brilliant Willie concocts a formula that unexpectedly turns its users young again, which accidentally mixes into soap in his grandparents' room. When Cat and Gene each use it, they suddenly find themselves back at 17. As they navigate their youthful selves, Willie scrambles to reverse the effects. However, both grandparents must decide if they truly wish to return to their older lives or embrace their second chance at youth.