The key to the future is finally unearthed.
Why it is hard sci-fi
A direct sequel to the 1982 film that respects its rule set. Replicants are still biological, still legal property, and still under a lifespan constraint. The Wallace Corporation has bought the bankrupt Tyrell Corporation and continues the business with marginal improvements. The film commits to a Los Angeles built on rising sea defences and a degraded climate. The protagonist is a replicant blade runner who hunts older models, which is a clean second-generation framing.
Science inside it
Replicant biology, memory-implant manufacture as a regulated cottage industry, holographic companions as a consumer product with attachment dynamics, and the central scientific question, whether a replicant can reproduce. The films world also sets up an off-world colonial economy with a labour pipeline that depends on the replicant lifecycle.
Spoiler alert
A replicant gave birth thirty years earlier to a child with two replicant parents, which violates the design assumption and threatens the legal regime. K, the protagonist, is not the child. The child is Ana Stelline, a memory designer. K returns Deckard to his daughter and dies on the steps. The film commits to a quiet ending rather than the cinematic one and is honest about the cost.