The Turtles return from Burnow Island to find unimaginable tragedy. As the family struggles to cope with these events, an enraged Foot Clan prepares its revenge. Meanwhile, Casey prepares for a final showdown with Hun as the Purple Dragons run amok. And, as the TMNT struggle to reunite as a family, a greater threat looms. Collects issues #45-47 and the 2015 FCBD issue.