Nick Daley is following in his father's footsteps as night watchman at the American Museum of Natural History, so he knows what happens when the sun goes down. But when the maniacal ruler Kahmunrah escapes, it is up to Nick to save the museum once and for all.

Two senior BFFs make a last-ditch attempt to be seen. But when one of them becomes a ghost, she'll need to really live her best life — while she can.