Complex sentence: Tia Dalma joins Barbossa, Will, Elizabeth, and the rest of the "Black Pearl's" motley crew to Singapore, where she helps infiltrate Sao Feng's headquarters to acquire the navigational charts needed to sail to Davy Jones' Locker.
Split into simpler sentences: Tia Dalma joins Barbossa, Will, Elizabeth, and the rest of the "Black Pearl's" motley crew as they travel to Singapore. They infiltrate Sao Feng's headquarters to acquire the navigational charts needed to sail to Davy Jones' Locker.