Taking place after the events of the second film, Theodore Templeton is forced to revert to his old Boss Baby self after being framed for embezzlement. Crashing with his older brother Tim and his two nieces, brainy big kid Tabitha and fellow Baby Corp employee Tina, he'll have to co-lead Tina's new Field Team fighting to increase Baby Love while keeping a new group of arch-nemeses, The Uncuddleables, from destroying Baby Corp itself.