  N=2 closed strings have been recently divided in hep-th/0211147 to two T-dual
families denoted by \alpha and \beta. In (2,2) signature both families have one
scalar in the spectrum. The scalar in the \beta-string is known to be a
deformation of the target space K\"ahler potential and the dynamics is that of
self-dual gravity. In this paper we compute the effective action of the scalar
in the \alpha-string. The scalar is a deformation of a potential that
determines the metric, torsion and dilaton. The scalar is free and the dynamics
is that of a self-dual curvature with torsion.
