Recently Sans has found something unusual from Gaster's lab. At midnight,he could often hear a strange sound coming,from his mind.

One day,Wist decided to pay Gaster a visit.Surprisingly,he found Gaster left.He heard the strange noise again,but after a few seconds,it disappeared.Wist wanted to find out the reason,so he went to Gaster's secret code door.

To his surprise,the door was open.He sneaked in,found a big machine.Suddenly,wist heard Gaster coming back,eyes green.Gaster looked at sans in anger,then started the destruction machine.

Sans has realized that this Gaster wasn't the one before,so he pushed him into the machine.With a giant sound,something terrible happened.

Everyone's soul has been turned into Dissapointment,just like the lengend.

Sans watched them die,one by one.Their determination melt,their souls broke into pieces.Even Papyrus has died in his arms.

Sans hurried to the lab again,trying to bring them back,but the machine was destroied by the final form of Gaster.Gaster and Sans began to fight,but Sans lost.He chained Sans up.Gaster injected Sans with Dissapointment.However,Sans have his 'Desire' soul.Two enemies went together,trying to get the ability to control Sans. At last ,Desire and Dissapointment went into a special being...

Sans suddenly become stronger than ever.He killed Gaster,at the same time,erased his ' Wistfulness'.Then June came,twisted Sans into a real monster.However,Sans killed June,and absorbed her soul.

Lying in ashes,Sans finally understood the strange noise.

It's a psycho's call.