A college photography student who discovers terrifying images of ghostly children in her shots of an abandoned amusement park races to uncover a decades-old mystery to save her son from the vengeful spirits.

Great improvement patricks. :D

Thanks for the feedback, everyone! I've been taking it all in and breaking the story some more - here's a newer version:

When a young mother whose photos capture terrifying images of the spirit world discovers ghostly intruders in her home, her quest to find out why leads her to an abandoned amusement park haunted by slain children and filled with decades-old secrets she must unlock to save herself and her son.

Or, a shorter version:

A young mother whose photos reveal ghostly images menacing her son finds they are connected to an abandoned amusement park haunted by slain children.

How does the the journalist come to realize that she must solve the mystery to save her son from vengeful spirits?

The logline for The Ring: "A young journalist must investigate a mysterious videotape which seems to cause the death of anyone in a week of viewing it." (22 words) In that movie, the journalist realizes it because people start dieing shortly after viewing it.

Main character discovers a deadly problem with a ticking clock. (The "death of anyone in a week" is both a reveal -- that 's how the journalist realizes there a big problem, right? -- and a ticking clock that adds urgency to the struggle to solve the mystery. A nice two-fer.)