- Yuki steals diamond from Revo
- Yuki's cat accidentally ingests diamond
- Cat runs away from cat-keeper Jr.
- lured to Nozaki family restaurant by scent of cooking gyoza
- Wakana finds cat after her shift and takes it home
Meanwhile...
- Revo calls in to police office to report missing diamond
- Senior Officer Hitoshi Konno gives the job to his secretary Miss Keiko because he says he is 'busy' with other work (when he is secretly working for SONY)
- Miss Secretary Keiko-san starts investigating
- Next day Wakana taKing the cat to buy food
- Ambushed by Mafia, Keiko happens to be walking past, rescues her from attackers
- They go on the run from the mafia in the middle of the night, climb into a random house to escape
- End up in Hikaru's bedroom, Hikaru wakes up, Mafia come storming in whilst the 3 girls escape together
Meanwhile...
- Hitoshi and the SONY MIB arrive at Hikaru's house minutes later to arrest Hikaru's sister for uploading Sony videos to youtube, but find the house empty and all smashed up
- Girls go back to Keiko's apartment where they meet Kaori (Keiko's younger sister), Yuuka (country girl) and Yuriko (landlady)
- Mafia eventually track them down to the apartment
- Epic fight scene ensues, culminating in Hikaru being taken hostage due to falling asleep in a random room during the battle
- As Hikaru is kidnapped, Keiko gets very upset
Meanwhile…
- Hitoshi and SONY MIB tracking the girls down
- Mafia takes Hikaru to Nozaki restaurant mafia base headquarters
- Because she is so upset, Keiko sneaks out to save Hikaru alone instead of waiting for Yuriko to call on her backup as the others had planned
- Wakana finds Keiko has disappeared and panics
- Meanwhile Keiko arrives at the restaurant, where he finds Revo having a romantic candlelit dinner with Yuki
- Keiko recognises Yuki from police records as a notorious mafia boss
- Yuki realises who Keiko is and calls in her henchmen, who surround Keiko
- They start fighting but Keiko is losing
- Backup arrives; Kaori, Yuuka, Wakana, Yuriko, Hanae, Eri, Kasahara come storming in
- at same time, SONY MIB and Hitoshi come storming in
- Huge epic 3-way battle (except for Revo who is confused)
- Kalafina choreographer and manager get shot in the melee
- Hikaru wakes up from her sleep because everyone being noisy, get annoyed, yells at everyone to stop fighting
- Using the power of ONEE Hikaru manages to somehow get everyone to sit in a big circle to 'discuss' their feelings through words rather than violence
- Revo reveals that he was planning to give Yuki the diamond as a wedding gift
- Yuki is horrified because that means she stole it for nothing since he was going to give it to her anyway
- Wakana feeds the cat a laxative so the diamond ring can be returned and everyone is happy
- discover Hitoshi's true identity as an agent of SONY
ENDING 1:
- Yuki invites the girls to join her mafia as special divisions 'Kalafina' and 'FictionJunction'
ENDING 2:
- This experience has tired Yuki of the mafia gang business, and she says she wants to consider a career change - she's always wanted to be a composer
- invites girls/mafia henchmen/SONY MIB to join her
- They all become friends and live happily ever after