There is an initial plan:

1.Sf3?? ~ 2.Sg6! ~ 3.Sc4 ~ 4.Se5 ~ 5.Sg6#

But it fails to implement the decision

comes from the other side:

1.Kg6! (~ 2.Sac6!)

1… Kg8 2.Sd7! Sb3 3.Sc6! Sd4 4.Se7+ Kh8

5.Se5! ~ 6.Sf7#