Tim and his Boss Baby little bro Ted have become adults and drifted apart. Tim is now a married stay-at-home dad to two daughters, while Ted is a hedge fund CEO. But a new Boss Baby is about to bring them together againand inspire a family business. When Tim's baby Tina reveals that she's a top-secret agent for Baby Corp on a mission to uncover the dark secrets behind her older sister's school and its mysterious founder, Dr Edwin Armstrong, the Templeton brothers will reunite in unexpected ways, re-evaluate the meaning of family, and discover what truly matters as they join her mission.