Complex sentence: Frankie used the Veto on Caleb in an attempt to mend fences with him after Amber's eviction and the Detonators' plan to backdoor Zach and bring "Team Zankie" to an end was put into motion after Frankie nominated Zach as Caleb's replacement.
Split into simpler sentences: Frankie used the Veto on Caleb in an attempt to mend fences with him after Amber's eviction. The Detonators' plan to backdoor Zach and bring "Team Zankie" to an end was put into motion after Frankie nominated Zach as Caleb's replacement.