What was THAT? Terri heard a loud cracking sound coming from the open window. It's coming from... the lake, she realized with a chill. The room was completely silent now. The steady, throbbing nightsounds had stopped the instant she'd heard the cracking, almost as if all those crickets and peepers had gotten scared from the noise and fell silent. And then- Ka-CRACK! She heard it again. And... SPLASH! Something had fallen into the lake, something that was very, very... big. It's nothing, Terri, she kept telling herself. Nothing to be afraid of. It was probably just a tree branch breaking off and falling in the water. Yeah, she thought sleepily, her eyes growing heavy. Just a tree branch... falling... in the water... And a moment later, Terri fell fast asleep... She never heard the next sound that sailed out of the woods... A scream. --- Terri is looking forward to spending the summer with her new friend, Patricia. Hot lazy days ahead... That is until one night Terri looks out her window and sees something moving across her lawn. Something big. Something...scary. Soon Terri finds herself on an adventure to discover what exactly she saw disappear into the woods behind her house. But she quickly realizes that the adventure will take her beyond the woods, to somewhere Terri has been forbidden to go. Down to the water... Down to...the lake. Terri is in a race against time as everyone around her starts to change: her mother, her uncle, her new best friend. She has to save them. But to do so she must head back to the old boathouse and unlock the secrets to the lake and it's horrible creatures. Creatures she thought could never exist... Monsters!