  We consider a new physics model, where the Standard Model (SM) is extended by
hyperchargeless $Y=0$ triplet fermions and Higgs triplet with hypercharge
$Y=2$. The first two generation fermion triplets are even under the $Z_2$
transformation. In contrast, the third fermion triplet and scalar triplet are
odd under the same $Z_2$ transformation. It is a unifying framework for the
simultaneous explanation of neutrino mass and mixing, dark matter,
baryogenesis, inflation, and reheating temperature of the Universe. The two
$Z_2$ even neutral fermions explain the neutrino low energy variables, whereas
the third one can serve as a viable dark matter candidate, explaining the exact
relic density. The scalar triplet is coupled nonminimally to gravity and forms
the inflaton. We calculate the inflationary parameters and find them consistent
with the new Planck-2018 constraints. We also do the reheating analysis for the
inflaton decays/annihilations to relativistic SM particles. The triplet
fermions associated with $Z_2$ even sector can provide the observed baryon
asymmetry of the Universe at the TeV scale.
