The story focuses on Lavender, a hoodie-wearing girl who awakens in a bed that's not her own, and surrounded by skull-masked strangers with cake and balloons. She's told by their leader, Grimm, that she's recently died and has joined their ranks. Rather than instantly believe them, she sets out to try and find her missing brother, Timmy, and escape from the outlandish people of the Hollow, though her actions may have grave consequences.
- Action Commands: When using the basic attack in battle, hitting the center of a "Strike" meter deals additional damage. A similar meter is used when evading attacks, though none of Lavender's skills use this feature.
- Bitch in Sheep's Clothing: The Baker, who tries to steal Timmy's soul to revive himself. Whether or not he succeeds will affect the ending.
- Disappeared Dad: It's revealed in the Best Ending that Lavender and Timmy's father died years before, the grief of which was the catalyst for Lavender running away (with Timmy following), getting into trouble, and ending up dead/"in a coma".
- Don't Fear the Reaper: Most of the normal reapers are just Average Joes, dutifully cleaning up the afterlife and preparing for when they're ready to move on, and most of them are polite and friendly. Their leader, Grimm, is unfailingly courteous and considerate, going out of his way to ensure that his Reapers are as happy as they can be given the circumstances and shouldering the most dangerous assignments himself in order to protect their mental well-being.
- Empty Eyes: Lavender is depicted with completely black eyes. In comparison, a revived Timmy has more normal-looking green eyes.
- Friendly Ghost: Most of the ghosts are definitely un-friendly, as their soul and spirit have been separated long enough to drive them mad, though there is a notable exception with Timmy.
- The Grim Reaper: The job of everyone in Grimm's Hollow, guiding recently-departed souls to the "true" afterlife, and snuffing out the frenzied spirits the departed leave behind.
- Good Is Not Soft: Grimm is very kind and cares for his reapers quite deeply. But he doesn't let that stop him from making difficult decisions like taking out the ghost of a subordinate reaper's loved one before they turn completely frenzied.
- Multiple Endings: There are four, depending on two factors: whether or not Lavender beats the Final Boss, and whether or not she's reached the maximum level.
- Worst Ending: Lavender is defeated by the Baker, who steals Timmy's soul and passes through the gate of death, hoping to revive himself. Lavender is then immediately defeated by Grimm when Timmy, now soulless, quickly becomes frenzied. She tries to escape to the true afterlife, but fails. Grimm narrates an epilogue, in which Lavender spends the rest of her afterlife out of the Hollow, mindlessly reaping any spirits she finds.
- Bad Ending: Lavender loses to the Baker. She also loses to Grimm, but gained enough Spirit Energy through battles to fight back, showing enough strength of spirit to pass on to the true afterlife and reunite with Timmy's soul. However, they both remain dead; instead of an epilogue, there is a shot of two graves.
- Good Ending: Lavender beats the Baker. Grimm apologizes for not arriving and intervening sooner. Soul and spirit reunited, Timmy returns to life. However, he is forced to part with Lavender, who must remain a reaper. Lavender provides an epilogue, mentioning that she sometimes overworks herself to deal with losing Timmy, but Grimm takes care of her and the other reapers.
- Best Ending: Lavender beats the Baker, returning Timmy to life, and gained enough Spirit Energy during her adventure to pass on. The siblings stay by each other's side as they enter the gate of death together, though they must part at the end; Lavender to the true afterlife, and Timmy returning to life. Years later, a grown-up Timmy provides an epilogue, reflecting on the grief of losing family, and still thinking fondly of his sister.
- Our Souls Are Different: In Grimm's Hollow, when someone is truly dead, their spirit and soul are separated. A weak spirit becomes a frenzied ghost that must be reaped, while a determined spirit can become a reaper. If a soul is yet to be snuffed out, a spirit can return to life with it. Even if that soul is not their own.
- Reasonable Authority Figure: Grimm; though he may seem much more imposing than the other reapers, he tries his best to be kind and honest to Lavender, as well as the other reapers.
- Sinister Scythe: Lavender's main weapon.
- The Underworld: What the Hollow appears to be, though it turns out to be more of an intermediary area.