A futuristic world where robots have become popular, Tae-pyeong is possessed by a robot body in an unfortunate accident. He meets Nana, whose life is threatened by her evil uncle, who killed her brother to take over the company. The story of a robot who sacrifices his entire body to protect a child in danger.

一条生活在海洋里的马鲛鱼被渔网捕捉，而后被困在了一家海鲜餐馆的水箱里。从那以后她不屈不挠地寻找逃脱的方法。跟水箱里其他来自渔场的鱼不同，悲观的怀疑论者“老比目鱼”也生长在大海。作为水箱里幸存时间最长的一条鱼，他凭借其生存之道控制着其他的鱼。对他而言，马鲛鱼试图逃出水箱的举动已经对他的统治构成了威胁。