One afternoon, the ghostbusters had paid a visit to the apartment of their very first client Dana Barrett, who was also the girlfriend of team member Peter Venkman.
But the visit was not for a job assignment, the group along with their receptionist Jeanie were over to help Dana get ready to have a party for her son Oscar's first birthday. Jeanie was helping Winston paint a homemade banner, Ray was in Oscar's room, wrapping presents, so that the toddler wouldn't see anything, Egon was blowing up balloons with a helium tank, Dana was working on a frosting recipe before making Oscar's cake in the kitchen and Peter was playing with Oscar, as a way of keeping the child distracted, and to keep Peter from stealing samples of the frosting.

Peter had dated Dana for a brief time after the ghostbusters saved the city of New York, but lawsuits for the team as well as the break up of the ghostbusters took a toal on the relationship and the two separated.
Peter returned to his life as a carefree bachelor, while Dana had met another man in the orchestra she was preforming with.
The two fell in love and had gotten married.
However, the union began to feel strained and even after Dana gave birth the couples son Oscar, her soon to be ex husband was offered a job with the London Symphony orchestra, leaving Dana and Oscar behind.
But now she was back with Peter, who had not only saved her but Oscar, after the ghostbusters battled with Vigo.
And as for Peter, who was never really good with kids had become close with Oscar as well.
It was almost like a family.

Peter was on the floor, playing with blocks with Oscar, who would knock over his towers, every time he finished building them, which caused the child to laugh.
After giving up with building, Peter picked up Oscar and placed him on his lap.
"You really think its funny to knock over somebody's block tower," Peter said to the toddler with a mock stren.
Oscar just babbled and smiled.
"Now, if you really want to laugh, watch this."
Peter then turned to Egon and asked, "Hey Egon, is it true sucking in helium changes the tone of your voice?"
Egon took a fully blown up balloon, sucked the air from it inside his mouth and answered in a high pitched voice, "Venkman, you know very well that theory is truthful."
Jeanie, Winston,Dana, and Peter all laughed, while Oscar bursted into a giggle fit.
At that moment, Ray exited Oscar's room, carrying an armful of wrapped gifts, when he asked Egon, "Peter tricked you with the helium theory again?"
"Yes, Egon answered in a squeaky voice, before clearing his throat, getting back to it's normal tone and replied, Yes he did."

Just then there was a knock at the door.
"I'll get it," said Dana, as she wiped her hands with a towel, removed her apron and answered the door.
Standing in the doorway was a young man in his early 20's, wearing tan slacks and a brown Western Union shirt and matching hat.
"Good afternoon," said Dana
"Good afternoon to you to ma'am.
I have a telegram for Ms. Dana Barrett," said the messenger.
"That would me."
The man handed Dana an envelope along with a clipboard and said, "Sign here please."
After signing the clipboard, Dana went to her purse, took something out of her wallet and gave the messenger a few dollar bills.
"Thank you, have a nice day," said the young man.
"You to," said Dana, before closing the door.

Dana opened the envelope, took the letter out and began to read it.
She suddenly cried out, "OH NO!" and nearly fell to her knees
Peter, who despite still holding Oscar, raced to hold Dana up.
The other three ghostbusters and Jeanie rushed to her side as well.
"Dana, are you OK?" asked Peter, who had a look and sound of concern.
"Dana what's wrong?" said Jeanie, who was worried as well.
Despite the fact that her eyes were about to get watery, Dana was able to pull together and answered in a slightly shaky voice, "It's a telegram from my ex-husband.
He's coming to New York tomorrow.
He wants to see me."
"What does the bum want?" said Peter, who was nearly growling.
"He wants custody of Oscar!" Dana burst into tears.
Peter handed Oscar to Jeanie, as he helped Dana to the couch to console her.
"I can't believe this is happening," Dana wept.
Peter held her and said, "It's OK.
We'll think of something."
"He wanted nothing to do with Oscar and now he's back and wants to take him from me."
"Shh!
Everything's going to work out."
"Dana, if you don't mind me asking, when was the last time you saw your ex-husband?" asked Egon.
Dana wiped her eyes, was able to collect herself and answered, "I never really talked about what happened between my ex-husband and I, but I'll confess something.
He actually left me not once but twice."
"When was that?" asked Ray.
"He had left for London on a job assignment as a fill-in for the London Symphony Orchestra.
I was offered the job as well, but I had just found out I was pregnant with Oscar.
My ex-husband told me it would only be a few months and he would be back before I would be in my second trimester.
He didn't come back until I was in my 7 month of pregnancy.
In fact, the day he was offered the position full time was the day my water broke.
He had gone to meet with the conductor, and meanwhile, I was in the hospital.
Alone and scared, even my parents were with me.
I had to call a taxi to take me there.
He wasn't even there for Oscar's birth.
He didn't show up until the next day and he was more interested in his new job than the birth of our child."
"That's a shame Dana," said Winston.
"We're sorry about what you went through," Jeanie added.
Dana sighed and said, "There's more to the story.
He also told me he met someone while in London, the ex-wife of a fellow musician, but he told me it was over.
He also said he would send for Oscar and I once he got settled, but I never heard from him."