It is known that the ``magic numbers'' valid in the valley of $\beta$-stability may evolve or even disappear when approaching the limits of the nuclear chard. In particular, the $N~=~28$ isotones are of special interest due to the rapid structural changes with the removal of few protons. $^{48}_{20}$Ca is known to be a spherical nucleus while the combined action of proton-neutron tensor forces causes the development of oblate deformation in $^{42}_{14}$Si. Spectroscopy information in $^{44}_{16}$S is of outstanding importance to understand how the deformation evolves from Z~=~20 to Z~=~14 in the N~=~28 isotones. In order to shed light on the underlying structure in $^{44}$S nucleus, two experiments aiming complementary information were performed and will be reported. The first measurement concentrate in the study of the decay pattern of the 0$^+_2$ isomeric state in $^{44}$S. The isomeric state was populated in the fragmentation of $^{48}$Ca beam into a $^{9}$Be target. The reaction products were separated by means of the B$\rho$-$\Delta$E-B$\rho$ method in the LISE spectrometer at GANIL. The half-life analysis in conjunction to the measured branching ration depopulating the isomeric state allowed to extract the mixing between the ground state and the 0$^+_2$ level assuming two state configuration mixing. The second experiment focus on in-beam spectroscopy in $^{44}$S produced by a two step-reaction. The fragmentation of a $^{48}$Ca beam into a $^{12}$C target produced $^{45}$Cl separated in the alpha spectrometer. Following, the $^{45}$Cl undergo $\pi$-knockout in a secondary target to form $^{44}$S which was separated from other ions in the SPEG spectrometer at GANIL and identified unambiguously in an even-by-event basis. The secondary target was surrounded in close geometry by 74~BaF$_2$ detectors allowing to measured in coincidence prompt $\gamma$-radiation and detected ions. Additionally, the large statistics allowed to perform $\gamma\gamma$-coincidences analysis crucial to construct the level scheme of $^{44}$S. Moreover, the preliminary analysis evidences the existence of a transition above the isomeric state observed for the first time in this type of experiments. By combining the experimental outcome of both measurement, the deformation in $^{44}$S has been inferred yielding spherical-prolate shape coexistence. The experimental results will be discussed in terms of Large Scale Shell Model calculations.