The only son of Gov. Adele Fenway, Bob, is engaged to Marian Lee, and at a dinner Adele announces her intention of giving them a wedding house. Having refused to support a water power bill endorsed by Jim Dornton, the political boss of the state, the governor is threatened.

On her first anniversary, Ann Reagan finds that her sister-in-law is involved with a shady character that she used to be intimate with, and determines to intervene.

Sinews of Steel is a 1927 American silent drama film directed by Frank O'Connor.