  The field equations are proposed for the third rank tensor field with the
hook Young diagram. The equations describe the irreducible spin two massless
representation in any $d\geq 3$. The starting point of the construction is the
linearised system of Einstein equations which includes the Nordstr\"om
equation. This equation, being considered irrespectively to the rest of the
Einstein system, corresponds to the topological field theory. The general
solution is a pure gauge, modulo topological modes which we neglect in this
article. We find the sequence of the reducible gauge transformations for the
linearised Nordstr\"om equation, with the hook tensor being the initial gauge
symmetry parameter. By substituting the general solution of the Nordstr\"om
equation into the rest of the Einstein's system, we arrive at the field
equations for the hook tensor. The degree of freedom number count confirms, it
is the spin two theory.
