Santa is allergic to cats, so he has a policy against delivering them as gifts, but little Tommy has been SO good, and all he wants is one small kitty. Santa says OK, but instead of one, the whole litter climbs into the sack. When Santa has a major allergic reaction, the kittens have to take over and deliver the presents on time.

Riley wants to rebuild her relationship with her mother and little sister, who are shut-ins due to her sister's illness. When Riley realizes her sister may not be sick, her mother will stop at nothing to keep her daughters with her forever.

这部B级怪兽电影由《鲨从天降》（Sharknado）的创作人打造，因此和《鲨从天降》一样充满了恶趣味。但是《鲨从天降》中的怪物是大鲨鱼，本片中的怪物却是……小鳗鱼。怪物不分大小，不分形状，只要能在最出人意料的时候发动致命攻击就是好怪物！故事发生在密歇根州的一座小镇，可怕的杀人七鳃鳗闹得当地居民人心惶惶。无论你是去泳池游泳，还是去厕所坐马桶，杀人七鳃鳗随时可能出现，让你稀里糊涂地丢掉性命。七鳃鳗是一种长着巨齿、漏斗状嘴并且能利用细长的身体在城市下水道中自由穿行的鳗鱼。当它们大开杀戒之时，无论你躲在哪里都不安全。下一个受害人会是谁？