Find the point of intersection of line $r=(3,7,1)+n(0,2,4)$ with the plane containing only $x-axis$ and $z-axis$.

Question

Find the point of intersection of line $r=(3,7,1)+n(0,2,4)$ with the plane containing only $x-axis$ and $z-axis$.

My Working:

The parametric representation of the the given line is: $x=3$, $y=7+2n$, $z=1+4n$.

Now I don't know how do I get the equation of plane from the information that "the plane contains only $x-axis$ and $z-axis.$" Once I know the equation of plane I know how to answer the question. Please guide me how do I find it.